Question 10
Trigonometrysin2x/(1 + cos x) + sin2x/(1 − cos x) is same as
- A.2
- B.1
- C.sin x
- D.cos2x
Show the answer and explanation
Answer: A (2)
Explanation
Over a common denominator: sin²x(1 − cos x + 1 + cos x)/(1 − cos²x) = 2sin²x/sin²x = 2.
sin2x/(1 + cos x) + sin2x/(1 − cos x) is same as
Answer: A (2)
Over a common denominator: sin²x(1 − cos x + 1 + cos x)/(1 − cos²x) = 2sin²x/sin²x = 2.