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निम्न फलनों के मान ज्ञात कीजिये - `int_(0)^(pi//2)(dx)/(1+2 cos x)` |
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Answer» Correct Answer - `(1)/(sqrt3)log(2+sqrt3)` `int_(0)^(pi//2)(dx)/(1+2 cos x)=int_(0)^(pi//2)(dx)/(1+2((1-tan^(2)x//2)/(1+tan^(2)x//2)))` `=int_(0)^(pi//2)(sec^(2)x//2)/(3-tan^(2)x//2)dx` अब माना `tan.(x)/(2)=t` |
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