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15 October, 13:52

Write the trigonometric expression in terms of sine and cosine, and then simplify.

tan θ / (sec θ - cos θ)

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  1. 15 October, 14:17
    0
    Hello,

    tan t / (sec t - cos t) = sin t / (cos t * (1/cos t - cos t))

    =sin t / (cos t * (1-cos ²t) / cos t))

    =sin t/sin² t=1/sin t [or=cosec t.]
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