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johnny101 Group Title

=

  • 9 months ago
  • 9 months ago

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  1. Easyaspi314 Group Title
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    cos^(-1) (x) is the inverse of cos x. Its the function on top of the COS button on your calculator.

    • 9 months ago
  2. johnny101 Group Title
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    so the expression f(x)=cos x then have an inverse right? Idk why i second guessed myself

    • 9 months ago
  3. johnny101 Group Title
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    has*

    • 9 months ago
  4. Easyaspi314 Group Title
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    Yes, f(x) = cos x has an inverse. It is called cos^(-1)(x).

    • 9 months ago
  5. Easyaspi314 Group Title
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    Thats why, on your calculator, on top of COS it says COS^-1..because you use that COS^-1 when you want the inverse of cos

    • 9 months ago
  6. johnny101 Group Title
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    alright thankyou

    • 9 months ago
  7. Easyaspi314 Group Title
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    To be very clear about this, if you want the cos of 57 degrees, you type in cos then 57 and you get your answer. If you have an angle whose cosine is .435 and you want the angle, you use COS^-1. Becuase you are going in the reverse direction, you are finding the angle (when you know the answer).

    • 9 months ago
  8. Easyaspi314 Group Title
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    welcome.

    • 9 months ago
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