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If sin^(-1) (a - (a^(2))/(3) + (a^(3))/(...

If `sin^(-1) (a - (a^(2))/(3) + (a^(3))/(9) + ...) + cos^(-1) (1 + b + b^(2) + ..) = (pi)/(2)` then

A

a = -3 and b =1

B

a = 1 and `b=-(1)/(3)`

C

a = 6 and `b=(1)/(3)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
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