Trigonometry Calculators

Trigonometric Identity Calculator

Simplify trig expressions using identities like sin²+cos²=1 and more

Inverse Trig & Radian Converter

Convert between arcsin, arccos, arctan angles and radian/degree values

Trig Equation Solver

Solve equations like sin(x)=a, cos(x)=a, tan(x)=a with step-by-step solutions

Sum-to-Product Calculator

Apply sum-to-product formulas: sinA±sinB, cosA±cosB

Product-to-Sum Calculator

Apply product-to-sum formulas: sinA·sinB, cosA·cosB, sinA·cosB

Law of Sines Calculator

Solve triangles using the Law of Sines with given sides and angles

Half Angle Formula Calculator

Compute sin, cos, and tan half-angle values using half-angle formulas

Double Angle Formula Calculator

Compute sin(2A), cos(2A), and tan(2A) using double-angle identities

Triple Angle Identity Calculator

Compute sin(3A), cos(3A), and tan(3A) using triple-angle identities

Cofunction Identity Solver

Apply cofunction identities to convert between sin/cos, tan/cot, sec/csc

Negative Angle Trig Calculator

Apply even-odd identities to compute trig functions of negative angles

Trig Product Identity Calculator

Apply product-to-sum and sum-to-product trig identities with two angles

Oblique Triangle Solver

Solve any non-right triangle using Law of Sines and Law of Cosines

Bearing and Azimuth Calculator

Convert between navigational bearing and azimuth angle formats

Trig Substitution Integral Calculator

Find the appropriate trig substitution for calculus integrals with square roots

Spherical Triangle Solver

Solve spherical triangles using the spherical law of cosines and sines

Trigonometric Graph Period Calculator

Compute period, amplitude, midline, and frequency of sine, cosine, and tangent functions

Phase Shift Calculator for Trig Functions

Compute the horizontal translation and starting point of trigonometric graphs

Exact Value of Trig Ratio Calculator

Find exact sine, cosine, and tangent values for common angles using special triangles

Supplementary Angle Trig Calculator

Apply supplementary angle identities: sin(180-A), cos(180-A), tan(180-A)

Spherical Law of Cosines Calculator

Compute great circle distances and spherical triangle properties using spherical law of cosines

Sine Calculator

Calculate sin(x) for angles in degrees or radians with step-by-step conversion

Cosine Calculator

Calculate cos(x) for angles in degrees or radians with unit circle explanation

Tangent Calculator

Calculate tan(x) for angles in degrees or radians with undefined angle checks

Secant Calculator

Calculate sec(x) as the reciprocal of cosine in degrees or radians

Cosecant Calculator

Calculate csc(x) as the reciprocal of sine in degrees or radians

Cotangent Calculator

Calculate cot(x) as cosine divided by sine in degrees or radians

Unit Circle Calculator

Find unit circle coordinates from an angle using cos θ and sin θ

Reference Angle Calculator

Find the acute reference angle for any degree angle by quadrant

Trig Ratio Calculator

Calculate sine, cosine, and tangent ratios from right triangle sides

Right Triangle Trig Calculator

Find opposite and adjacent sides from an acute angle and hypotenuse

Degrees to Radians Calculator

Convert degree angles to radians using radians equals degrees times π over 180

Radians to Degrees Calculator

Convert radian angles to degrees using degrees equals radians times 180 over π

Coterminal Angle Calculator

Find positive and negative coterminal angles by adding or subtracting 360 degrees

Quadrant Calculator

Find which quadrant or axis position an angle lies in after normalization

Terminal Point Calculator

Find terminal point coordinates from angle and radius using cosine and sine

Complementary Angle Calculator

Find the angle that adds with a given angle to make 90 degrees

Angle of Elevation Calculator

Find angle of elevation from vertical height and horizontal distance

Angle of Depression Calculator

Find angle of depression from vertical drop and horizontal distance

Arcsin Calculator

Calculate inverse sine in degrees and radians for values from -1 to 1

Arccos Calculator

Calculate inverse cosine in degrees and radians for values from -1 to 1

Arctan Calculator

Calculate inverse tangent in degrees and radians for any real input

Arcsec Calculator

Calculate inverse secant in degrees and radians using arccos of reciprocal

Arccsc Calculator

Calculate inverse cosecant in degrees and radians using arcsin of reciprocal

Arccot Calculator

Calculate inverse cotangent in degrees and radians for any real input

Trig Values Calculator

Calculate all six trigonometric function values for an angle in degrees

Trig Signs Calculator

Find sine, cosine, and tangent signs by quadrant using ASTC rules

Angle Sum Calculator

Calculate sine, cosine, and tangent values for an angle sum A plus B

Angle Difference Calculator

Calculate sine, cosine, and tangent values for an angle difference A minus B

Amplitude Calculator

Find amplitude of a sine or cosine function from coefficient A

Vertical Shift Calculator

Find vertical shift and midline of a sine or cosine function from D

Pythagorean Identity Calculator

Verify the trig identity sin squared plus cos squared equals one

Reciprocal Identity Calculator

Calculate secant, cosecant, and cotangent using reciprocal identities

Quotient Identity Calculator

Calculate tangent and cotangent from sine and cosine using quotient identities

Sine Graph Calculator

Find amplitude, period, phase shift, and midline for a sine graph

Cosine Graph Calculator

Find amplitude, period, phase shift, and midline for a cosine graph

Tangent Graph Calculator

Find period, phase shift, and vertical shift for a tangent graph

Secant Graph Calculator

Find vertical stretch, period, phase shift, and midline for a secant graph

Cosecant Graph Calculator

Find vertical stretch, period, phase shift, and midline for a cosecant graph

Cotangent Graph Calculator

Find vertical stretch, period, phase shift, and midline for a cotangent graph

30-60-90 Triangle Calculator

Calculate special right triangle sides using the x, x√3, 2x ratio

45-45-90 Triangle Calculator

Calculate isosceles right triangle sides using the x, x, x√2 ratio

Slope Angle Calculator

Convert slope to angle in degrees using inverse tangent

Polar to Rectangular Calculator

Convert polar coordinates to rectangular coordinates using x equals r cos theta and y equals r sin theta

Rectangular to Polar Calculator

Convert rectangular coordinates to polar coordinates using radius and atan2 angle

Vector Angle Calculator

Find the angle between two 2D vectors using the dot product formula

Heading Components Calculator

Resolve distance and heading angle into horizontal and vertical components

Grade to Angle Calculator

Convert percent grade to slope angle in degrees using arctangent

Angle to Grade Calculator

Convert slope angle in degrees to percent grade using tangent