Question 2
TrigonometrySimplify (1 − sin θ)(1 + sin θ).
- A.sin2θ
- B.sec2θ
- C.tan2θ
- D.cos2θ
Show the answer and explanation
Answer: D (cos2θ)
Explanation
(1 − sin θ)(1 + sin θ) = 1 − sin²θ = cos²θ.
Simplify (1 − sin θ)(1 + sin θ).
Answer: D (cos2θ)
(1 − sin θ)(1 + sin θ) = 1 − sin²θ = cos²θ.