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Math Help - [SOLVED] help adding and multiplying! trigonometry identities

  1. #1
    twizlstikz
    Guest

    [SOLVED] help adding and multiplying! trigonometry identities

    ok i really dont know what i am supposed to do when part of a problem is
    sin2 θ sin θ or

    Tan θ + tan2 θ

    or 1 - Tan θ x tan2 θ ...

    like they arent the problems its just i dont know how i am supposed to add/multiply them... like is it tan sqaaured 2 theta or what?? please help this is causing me alot of trouble. its like index laws but not
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  2. #2
    Junior Member AlvinCY's Avatar
    Joined
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    I live in Sydney, Australia.
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    If you look at: List of trigonometric identities - Wikipedia, the free encyclopedia

    You'll find a lot of trigonometric identities, but focus on the "double angle" formula that converts tan 2x into tan x's

    :-) Hope that helps.
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