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sabika13

  • 3 years ago

How do I prove this: (secx-cosx)(cscx-sinx)=tanx/(1+tan^2x)

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  1. sabika13
    • 3 years ago
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    left side: (1-cos^2x)/cosx * (1-sin^2x)/sinx (sin^2xcos^2x)/(sinxcosx) sinxcosx is that right?

  2. savvers
    • 3 years ago
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    hmmmm

  3. savvers
    • 3 years ago
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    you have a calculater?

  4. savvers
    • 3 years ago
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    with the sin cos

  5. sabika13
    • 3 years ago
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    yeah i do, but imnot suppose to use a calculator for this

  6. Mertsj
    • 3 years ago
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    \[(1/\cos-\cos)(1/\sin-\sin)=[ (1-\cos^2)/\cos][(1-\sin^2)/\sin]=(\sin^2/\cos)(\cos^2/\sin)\]

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