∫1/1+cosa.cosx dx

read as :integration of 1 divided by 1+cosa.cosx w.r.t x

ans:2cosec a.tan-1[tan(a/2).tan(x/2)]+c

read as:2cosec a multiplied by tan inverse of tan(a/2) into tan(x/2).

Dear Sanket,

i have reduced the integral to the integrable form you can easily solve it thereafter

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