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    shannieboo4's Avatar
    shannieboo4 Posts: 1, Reputation: 1
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    #1

    Jan 31, 2012, 06:52 PM
    Verifying trigonometric identities solver
    Verify cos^2(x)-sin^2(x)=1-2sin^2(x)
    Aurora2000's Avatar
    Aurora2000 Posts: 111, Reputation: 16
    Junior Member
    		  
    #2

    Feb 1, 2012, 02:00 AM
    Start from identity

    subtract both sides and you get
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