Vanshika Asked a Question
July 29, 2020 3:45 pmpts 30 pts
I don't understand the flowing steps ....which formulas are used? plz helo me out
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  • Ravi prakash yadav Best Answer
    in step 1,they have simply expanded using formula for sin(a)cos(b)=(sin(b+a)+sin(b-a))/2. In step 2 they have simply integrated,but step 2 is written incorrect. See the attachment
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  • Deepak singh thankyou
    see attached ..
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    Deepak singh
    any doubt then ask
  • Chandra dhawan
    see attached file.... and try to understand, how to solve your prob
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    Chandra dhawan
  • Deepak singh
    in first , use this formula ,
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    Deepak singh
    in second , there is simple integration of sin function