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Lv 4
? asked in Science & MathematicsMathematics · 5 years ago

How can I write cos(2t) like a function of sin(t)?

Update:

To answer I need to use that cos(2t)=f(sin(t))

2 Answers

Relevance
  • cidyah
    Lv 7
    5 years ago

    cos(2t) = cos^2(t) - sin^2(t)

    or

    1- 2sin^2(t)

    or

    2 cos^2(t) - 1

  • DWRead
    Lv 7
    5 years ago

    cos(2θ) = 1-2sin²θ

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