Trigonometry Calculator — foxyyy

Trigonometry Calculator

ANGLE

sin-

cos-

tan-

csc-

sec-

cot-

Inverse Trig

VALUE

arcsin-

arccos-

arctan-

Right Triangle Solver

Enter any 2 sides to solve for all sides and angles.

SIDE a (opposite) SIDE b (adjacent) HYPOTENUSE c

a-

b-

c-

Angle A-

Angle B-

Angle C90 deg

Trig Identities Reference

Identity	Formula
Pythagorean	sin^2(x) + cos^2(x) = 1
Pythagorean	1 + tan^2(x) = sec^2(x)
Pythagorean	1 + cot^2(x) = csc^2(x)
Double Angle	sin(2x) = 2sin(x)cos(x)
Double Angle	cos(2x) = cos^2(x) - sin^2(x)
Double Angle	tan(2x) = 2*tan(x) / (1 - tan^2(x))
Sum	sin(a+b) = sin(a)cos(b) + cos(a)sin(b)
Sum	cos(a+b) = cos(a)cos(b) - sin(a)sin(b)
Half Angle	sin(x/2) = +/-sqrt((1-cos(x))/2)
Half Angle	cos(x/2) = +/-sqrt((1+cos(x))/2)
Reciprocal	csc(x) = 1/sin(x)
Reciprocal	sec(x) = 1/cos(x)
Reciprocal	cot(x) = 1/tan(x)

Copied!