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anonymous

  • one year ago

sin(pi/2)= cos ?

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  1. mathmate
    • one year ago
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    hint: sin(x)=cos(\(\pi/2-x\))

  2. anonymous
    • one year ago
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    I'm very confused, can you explain how to do the question?

  3. mathmate
    • one year ago
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    sin(x)=cos(π/2−x) now you have sin(pi/2) which means that x=pi/2. use the identity above to help you find the answer.

  4. anonymous
    • one year ago
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    So would the answer just be pi?

  5. mathmate
    • one year ago
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    sin(x)=cos(pi/2-x) sin(pi/2)=cos(pi/2-pi/2)=?

  6. anonymous
    • one year ago
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    so it would just be cos(0), correct?

  7. mathmate
    • one year ago
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    correct! Well done! :)

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