Neha Hema raj Asked a Question
May 11, 2020 12:19 ampts 30 pts
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  • Ujjawal vishal
    i think u should post the pic including its preceding steps ...remember D^2 is replaced by -a^2 not by (-a)^2..If there is Cosx then a =1 so D^2 will be replaced by -(1^2) =-1..the...
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  • Arzoo Best Answer
    There is mistake in the solution. See the attachment
    • cropped3845052041591684943.jpg
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