Math

Trigonometry Calculator

Calculate trigonometric functions and solve triangle problems

Calculation Type*

Angle Unit*

Function Type*

Angle Value*

Decimal Places*

Function Result

0.7071

Calculated trigonometric function value

Explanation

Sine is the ratio of the opposite side to the hypotenuse in a right triangle.

Sine: sin(θ) = opp/hyp
Cosine: cos(θ) = adj/hyp
Law of Cosines: a² = b² + c² - 2bc·cos(A)

Supported inputs

Input	Description
Calculation Type	Select calculation type Trigonometric Function Value · Triangle Solution
Angle Unit	Select angle unit Degrees (°) · Radians (rad)
Function Type	Select trigonometric function Sine (sin) · Cosine (cos) · Tangent (tan) · Cotangent (cot) · Secant (sec) · Cosecant (csc)
Angle Value	Enter angle value
Given Conditions	Select given triangle conditions sss · sas · asa · aas · right_triangle
Side A	Length of side A
Side B	Length of side B
Side C	Length of side C
Side a	Length of side a
Angle C	Angle C (opposite to side c)
Side b	Length of side b
Angle A	Angle A
Side c	Side c (opposite to angle C)
Angle B	Angle B
Known Values	Select known values in right triangle hypotenuse_leg · two_legs · leg_angle
Hypotenuse c	Length of hypotenuse c
Leg a	Length of leg a
Leg b	Length of leg b
Acute Angle A	Acute angle A (opposite to leg a)
Decimal Places	Decimal places for result

Formula

Sine: sin(θ) = opp/hyp
Cosine: cos(θ) = adj/hyp
Law of Cosines: a² = b² + c² - 2bc·cos(A)

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