Sine, Cosine, Tangent, Cotangent, Secant and Cosecant.

Sin A = Perpendicular/Hypotenuse Cos A = Base/Hypotenuse Tan A = Perpendicular/Base

Sin, Cos and Tan are three main functions in trigonometry.

The three fundamental identities are: 1. sin 2 A + cos 2 A = 1 2. 1+tan 2 A = sec 2 A 3. 1+cot 2 A = csc 2 A

Right-angled triangle

The trigonometric ratios tan equals cot when the angle equals 45 degrees. (i.e. tan 45° = cot 45° = 1)

Trigonometric formulas are used to evaluate the problem, which involves trigonometric functions such as sine, cosine, tangent, cotangent, cosecant...

The formula for sin 3x is 3sin x – 4sin 3 x.

The values of sin, cos and tan for 60° are given by: sin 60° = √3/2 cos 60° = 1/2 tan 60° = √3

The value of cos is 0 at an angle of 90°, i.e., cos 90° = 0.

The value of sin 0° is 0.