Q24Multiple choice
If the middle term of + x sin x is equal to 7 , then value of x is x 8 π π π π
- (A)2nπ +
- (B)nπ +
- (C)nπ + (–1)n
- (D)nπ + (–1)n 6 6 6 3 1 5 63 1 1 [Hint: T6 = 10 C5 ⋅ x sin 5 x = ⇒ sin5 x = 5 ⇒ sin x = x 5 8 2 2 π ⇒ x = nπ + (–1)n ] Fill in the blanks in Exercises 25 to 33.