Question 40
TrigonometrySimplify cos2 x(sec2x + sec2 x tan2x).
- A.Tan x
- B.Tan x sec x
- C.sec2 x
- D.Cosec2 x
Show the answer and explanation
Answer: C (sec2 x)
Explanation
cos2x × sec2x = 1, so the expression is 1 + tan2x = sec2x.
Simplify cos2 x(sec2x + sec2 x tan2x).
Answer: C (sec2 x)
cos2x × sec2x = 1, so the expression is 1 + tan2x = sec2x.