Trigonometric Functions of Multiple Angles
Trigonometric Functions of Multiple Angles: Overview
This topic covers concepts such as Trigonometric Identities for Multiple Angles, Expansion of sin2A, Expansion of cos2A, Expansion of tan2A, Expansion of sin3A, Expansion of cos3A, Expansion of tan3A, etc.
Important Questions on Trigonometric Functions of Multiple Angles
Let for some real number then the value of for which is constant for all values of is

For if then

is equal to –

The value of is

Find value of .

The value of the square of the expression is _____.

is equal to

What is the value of ?

Find the exact value of .

What is the value of ?

If and lies in third quadrant then .

If , find the value of .

If and lies in fourth quadrant, then find .

If and lies in second quadrant, then find .

If and lies in third quadrant then .

If , find the value of .

If , find the value of .


Given that and are in the same quadrant, and the value of , then

Find the value of .
