Question

The equation sin($\theta +\Pi$) = -sin $\theta$ for all acute angle $\theta$.

• A. True
• B. False

Answer 1

The correct option is A

True

We know that, ($\theta +\Pi$) lies in third quadrant.
Value of sine of an angle in the third quadrant is negative.
Therefore,
sin($\theta +\Pi$) = -sin $\theta$