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    sarahhope13's Avatar
    sarahhope13 Posts: 1, Reputation: 1
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    #1

    Nov 7, 2013, 07:45 PM
    Proving identities solver
    (cosB/secB)-(cotB/tanB)=-cos^2B(cot^2B)

    Can someone prove this by only working on one side. Show all steps please
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Nov 8, 2013, 06:38 AM
    We're not going to do your homework for you. But here's a hint: as ususal, the best way to approach this is to convert the tangent, cotangent and secant functions to their sine and cosine equivalents. Then it's a simple matter of combining terms and looking for opportuinities to use fundamental identities such as sin^2B + cos^2B = 1.
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