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Thread: Cosine

  1. January 18th 2009, 01:00 PM #1
    live_laugh_luv27
    live_laugh_luv27 is offline
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    Question Cosine

    If cosθ = 0.6, then cos(θ + ) = ?

    How would I start this problem?
    Thanks for your help!
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  2. January 18th 2009, 01:27 PM #2
    Mush
    Mush is offline
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    Quote Originally Posted by live_laugh_luv27 View Post
    If cosθ = 0.6, then cos(θ + ) = ?

    How would I start this problem?
    Thanks for your help!
    cos(\theta+\pi) = -cos(\theta)
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