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Deepak Bora
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Prove that (sin θ) (cos θ) = tan θ/( 1 + tan^2 θ )

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Prove that (sin θ) (cos θ) = tan θ/( 1 + tan 2 θ )

 

 

This is a question from class 10 maths ICSE book (Understanding ICSE mathematics). This chapter is Trigonometric Identities from ML Aggarwal(SELINA Publishers).

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1 Answer

  1. RHS = tan θ/ sec 2 θ

    = (sin θ/ cos θ )/ sec 2 θ

    =(sin θ  X cos 2θ)/ cos θ

    sin θ X cos θ

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