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Ohsnapitzme Group Title

Find the exact value of each expression without a calc.? cos(-π/6)sin(-π/4)-tanπ/4

  • one year ago
  • one year ago

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  1. cory_ryan Group Title
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    cos(-π/6)=-sqrt3/2 sin(-π/4)=-sqrt2/2

    • one year ago
  2. cory_ryan Group Title
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    -1

    • one year ago
  3. shining Group Title
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    cos (-x)=cos(x) cos(pi/6)=sqrt3/2 sin(pi/4)=sqrt2/2 tan(pi/4)=1 now solve

    • one year ago
  4. Ohsnapitzme Group Title
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    So i get the sol for the 3 equations separately and that's just my answer? Why are the eq stuck together then?

    • one year ago
  5. shining Group Title
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    multiply them

    • one year ago
  6. Ohsnapitzme Group Title
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    hold on

    • one year ago
  7. Ohsnapitzme Group Title
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    sqrt 6/2?

    • one year ago
  8. shining Group Title
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    so the answer is sqrt3/2 * (-sqrt2/2) -1

    • one year ago
  9. Ohsnapitzme Group Title
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    sqrt6 - 2/2?

    • one year ago
  10. cory_ryan Group Title
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    that should be your answer!

    • one year ago
  11. Ohsnapitzme Group Title
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    Awesome, great thanks :)

    • one year ago
  12. cory_ryan Group Title
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    yeah

    • one year ago
  13. shining Group Title
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    good

    • one year ago
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