Question

For any value of $\theta$, $si{n}^2\theta +co{s}^2\theta =$ _______ .

• A. 0.0
• B. $\frac{1}{2}$
• C. 1
• D. 2

Answer 1

The correct option is C 1

The trigonometric equations which hold true for any value of the angle are known as trigonometric identities.
For any value of $\theta$, $si{n}^2\theta +co{s}^2\theta =1$.