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iluvvyyhu

  • 2 years ago

May someone show me how to solve this problem? Find the exact value of the trigonometric function. Do not use a calculator. 5) sin 5π/4

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  1. iluvvyyhu
    • 2 years ago
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    Please :( can someone help me, its pre-calc

  2. Hero
    • 2 years ago
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    Hint: Let \(\pi = 180\)

  3. iluvvyyhu
    • 2 years ago
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    -_- omg... is it -sqrt2/sqrt2?

  4. Hero
    • 2 years ago
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    Yup, you got it

  5. iluvvyyhu
    • 2 years ago
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    lol i feel so dumb now lol XD thanks!

  6. Hero
    • 2 years ago
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    Why? The technique of letting pi = 180 is not very popular.

  7. Hero
    • 2 years ago
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    In fact, your teacher may not approve of the steps

  8. iluvvyyhu
    • 2 years ago
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    oh because in my class we had to draw out a circle with different measuements and memorize it, and i completely forgot that i was supposed to use the circle to solve it

  9. Hero
    • 2 years ago
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    I mean I would solve it algebraically as you have using the substitution of pi with 180, but the thing is, now that you know what the exact value is, you can still do it the way your teacher wants.

  10. Hero
    • 2 years ago
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    letting pi = 180 saves you from having to memorize the circle.

  11. Hero
    • 2 years ago
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    There's another technique that amistre 64 knows that's a huge shortcut for memorizing the unit circle that I know you would like. Ask him about it.

  12. iluvvyyhu
    • 2 years ago
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    Oh okay thankyou(: I'd rather do that than draw out a circle everytime lol

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spraguer (Moderator)
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