The expression 3sec2θtan2θ + tan6θ – sec6θ is equal to:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e -1
In the equation, putting θ = 45º
⇒ 3 sec245ºtan245º + tan645º - sec645º
⇒ 3 × 2 + 1 - 8
⇒ 6 + 1 - 8
⇒ -1