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    Sin A . Sin(A+B) is equal to ...

    Sanjay Yadav 29th Apr, 2019
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    Shagufa Zareen Student Expert 29th Apr, 2019

    Dear Sanjay,

    As given,

    Sin A. Sin (A+B)

    Using Sin(A+B)=SinA Cos B+CosA Sin B

    =SinA (SinA CosB+CosA SinB)

    Sin A. Sin (A+B)=Sin2(sin square)A CosB+SinA CosA SinB

    I hope you have got your answer.

    Good luck with the trignometry.

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    dhameerbhatia31_7970609 Student Expert 29th Apr, 2019

    Hello Sanjay Yadav,

    Given= sinA.sin(A+B)

    USING Sin(A+B)=sinAcosB+cosAsinB

    =sinA(sinAcosB+cosAsinB)


    ∴  sinA.sin(A+B)=sin²AcosB+sinAcosAsinB

    Thanku.

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