The value of 4 [((1 - SecA)2 + (1 + SecA)2)/(1 + Sec2A)] is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e 8
⇒ 4 [((1 - SecA)2 + (1 + SecA)2))/(1 + Sec2A)]
⇒ 4 [(1 + sec2A - 2secA + 1 + sec2A + 2secA)/(1 + Sec2A)]
⇒ 4 [(2 + 2sec2A) / (1 + Sec2A)]
⇒ 4 × 2 = 8