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Question

Mathematics Question on Trigonometric Identities

If 0xπ0 \leq x \leq \pi and +81sin2x+81Cos2x=3081^{sin^2x}+81^{Cos^2x}=30 then x=x=

A

π6\frac {\pi}{6}

B

π2\frac {\pi}{2}

C

π4\frac {\pi}{4}

D

3π4\frac {3\pi}{4}

Answer

π6\frac {\pi}{6}

Explanation

Solution

Answer (a) π6\frac {\pi}{6}