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How should I solve this? I am unable to understand.

How should I solve this? I am unable to understand.

Question Image
Grade:12

1 Answers

Arun
25763 Points
4 years ago
divide and multiply by \sqrt{}1- cosA
you will get denominator as (1- cosA) out of the cube root sign
now put the formula of cosA in terms of sin(A/2)
you will get denominator in sin function now it will cancelled by the manipulation done in numerator and you will find your answer
hope it helps

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