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Math Help - Sine to cosine shift

  1. #1
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    Post Sine to cosine shift

    Explain how y = 4sinθ can be written as a cosine function.

    Thanks for any help!
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  2. #2
    Newbie XanthanPower's Avatar
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    I'm not exactly sure how you want it, but...

    sinθ = cos((pi/2)-θ) (in radians)

    Therefore, you could write y = 4sinθ as y = 4cos((pi/2)-θ)
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  3. #3
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    Quote Originally Posted by XanthanPower View Post
    I'm not exactly sure how you want it, but...

    sinθ = cos((pi/2)-θ) (in radians)

    Therefore, you could write y = 4sinθ as y = 4cos((pi/2)-θ)

    Thanks for the help
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