Correct Answer: Option A

Explanation

sin \(\theta\) = cos \(\theta\) 0 \(\leq\) \(\theta\) \(\leq\) 360o

The acute angle where sin \(\theta\) = cos \(\theta\) = 45o

But at the third Quadrant Cos \(\theta\) = -ve; sin \(\theta\) = -ve.

at the 3rd quadrant, value with respect to Q is

(180 + Q) where Q = acute angle

(180 + 45) = 225°

The two solution are 45°, 225°

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