Question

Let S = {$x∈(−\frac{ π}{ 2} , \frac{π}{2} )$ : 91−tan2 x + 9tan2 x=10 } and $β=∑_{ x∈s} t a n ^2 (\frac{ x}{ 3} )$ , then $\frac{1}{6}$ ( β − 14 )2 is equal to

• A. 8
• B. 16
• C. 32
• D. 34

Answer 1

Answer: (C)

32

Answer 2

The correct option is(C): 32