Anku Asked a Question
April 26, 2020 4:43 pmpts 30 pts
can we write if yes how pls explain steps else if not why we can't???
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  • Priyadarshan Choursiya thankyou
    no. see attachment. if you put both, attachment answer and your answer equal then you find that one side is imaginary and other is real (since sin2 and cos2 are real) which is cont...
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    • cropped2025962219879384575.jpg
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    Anku
    thank u sir
  • Anku
    isnt it so e^-x=-sinx????
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  • Ujjawal vishal Best Answer
    e^(ix)= cosx + iSinx So, e^(-2i) = Cos(-2)+iSin(-2)= Cos2-iSin2
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    Anku
    we can't wrie only -sin2 ....