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Thread: (3sin20+5cos70)/2sin20= ?

  1. April 21st 2010, 12:40 AM #1
    alternative
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    (3sin20+5cos70)/2sin20= ?

    Hi,
    Can somebody help me with this;

    (3sin20+5cos70)/2sin20=


    Can we write cos70=sin90-70=sin20

    Thanks
    Last edited by mr fantastic; April 21st 2010 at 12:46 AM. Reason: Re-titled post.
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  2. April 21st 2010, 12:47 AM #2
    mr fantastic
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    Quote Originally Posted by alternative View Post
    Hi,
    Can somebody help me with this;

    (3sin20+5cos70)/2sin20=


    Can we write cos70=sin90-70=sin20

    Thanks
    Yes.
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