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qwerty1234321 Group Title

if sin x=.21 what is cos x?

  • 2 years ago
  • 2 years ago

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  1. muhammad9t5 Group Title
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    use sinx^x+cosx^+1=0

    • 2 years ago
  2. muhammad9t5 Group Title
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    \[sinx^2+cosx^2+1=0\]

    • 2 years ago
  3. qwerty1234321 Group Title
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    this is hard..im bad at trig

    • 2 years ago
  4. qwerty1234321 Group Title
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    i dont get it..

    • 2 years ago
  5. muhammad9t5 Group Title
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    \[cosx^2=1-sinx^2\] \[cosx^2=1-(0.21)^2\] \[cosx^2=1-0.0441\] \[cosx^2=0.9559\] take square root both sides \[cosx=0.977\]

    • 2 years ago
  6. muhammad9t5 Group Title
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    do u understandd? if yes please click on best answer.

    • 2 years ago
  7. qwerty1234321 Group Title
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    thankks:)

    • 2 years ago
  8. qwerty1234321 Group Title
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    thankks:)

    • 2 years ago
  9. muhammad9t5 Group Title
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    u r welcome always.

    • 2 years ago
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