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Sin(pi+theta)Sin(pi-theta)cosec^2theta

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Sin(pi+theta)Sin(pi-theta)cosec^2theta

    • Posted by Yogeshwara .V 4 years, 6 months ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Shweta Gupta 4 years, 6 months ago

    Sin(pi+ theta)= -sin theta. becoz in third quadrant sin is -ve Sin(pi- theta)= sin theta. becoz in 2nd quadrant sin is +ve Sin( pi+theta)Sin(pi-theta)cosec^2theta = - sin theta×sin theta(cosec^2 theta) = -sin^2theta × cosec^2theta = -1 Ans=-1

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