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Sariah

  • 4 years ago

Use a coterminal angle to find the exact value of the expression. Do not use a calculator. Seleccione una respuesta. a. b. c. d.

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  1. saruz
    • 4 years ago
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    are you spanish? and where is the question and options

  2. Sariah
    • 4 years ago
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    \[\cos405\]

  3. saruz
    • 4 years ago
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    cos405=cos(360+45)=cos45=1/root(2)

  4. Sariah
    • 4 years ago
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    to choose one answer

  5. saruz
    • 4 years ago
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    No tengo idea de ángulo coterminal ....... lo siento

  6. saruz
    • 4 years ago
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    but the answer i found is.707

  7. ash2326
    • 4 years ago
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    co405=cos(360+45) cos (A+B)=cosAcosB-sinAsinB cos(360+45)=cos(360)cos(45)-sin(360)sin(45) cos360=1 sin360=0 sin45=cos45=1/sqrt(2) so cos405=1/sqrt(2) or 0.707

  8. ash2326
    • 4 years ago
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    \[1/\sqrt(2)\]=1/1.414=0.707

  9. saruz
    • 4 years ago
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    but ash2326 , in options there is no .707

  10. ash2326
    • 4 years ago
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    you wrote before that answer given is 0.707

  11. Sariah
    • 4 years ago
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    Use a coterminal angle to find the exact value of the expression. Do not use a calculator. \[\cos 405\]° Choose the rifht answer: |dw:1322555209852:dw|

  12. ash2326
    • 4 years ago
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    sariah it's 1st option \[1/\sqrt(2) =\sqrt(2)/2\]

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