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C2 maths help Watch

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    (Original post by RDKGames)
    So express the fraction in terms of sine and cosine first, then simplify...
    Hi thanks for replying.
    Can you help me with this question?
    Show that (tanx sinx) / (1 - cos x) = 1 + (1 / cos x)

    I got up to [(1/cos x) - (cos x)] / (1 - cos x) but im not sure what to do next.
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    Show that (tanx sinx) / (1 - cos x) = 1 + (1 / cos x)

    I got up to [(1/cos x) - (cos x)] / (1 - cos x) but im not sure what to do next.
    • Thread Starter
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    Show that (tanx sinx) / (1 - cos x) = 1 + (1 / cos x)

    I got up to [(1/cos x) - (cos x)] / (1 - cos x) but im not sure what to do next.
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    (Original post by man111111)
    Hi thanks for replying.
    Can you help me with this question?
    Show that (tanx sinx) / (1 - cos x) = 1 + (1 / cos x)

    I got up to [(1/cos x) - (cos x)] / (1 - cos x) but im not sure what to do next.
    Multiply top and bottom by cosine.

    Use the difference of two squares fact (which is x^2-y^2=(x+y)(x-y))
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    (Original post by RDKGames)
    Multiply top and bottom by cosine.

    Use the difference of two squares fact (which is x^2-y^2=(x+y)(x-y))
    Thank you
 
 
 
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