Trigonometry Formulas

Q1

What are the basic trigonometric ratios?

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

Q2

What are formulas for trigonometry ratios?

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

Q3

What are the three main functions in trigonometry?

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

Q4

What are the fundamental trigonometry identities?

The three fundamental identities are:
1. sin² A + cos² A = 1
2. 1+tan² A = sec² A
3. 1+cot² A = csc² A

Q5

Trigonometry formulas are applicable to which triangle?

Right-angled triangle

Q6

At what angle, the trigonometric ratio tan is equal to the cot?

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

Q7

What are trigonometric formulas?

Trigonometric formulas are used to evaluate the problem, which involves trigonometric functions such as sine, cosine, tangent, cotangent, cosecant and secant. Using the different trigonometric identities, we can solve the problems which involve the right triangle’s angles and sides.

Q8

What is the formula for sin 3x?

The formula for sin 3x is 3sin x – 4sin³x.