anonymous
  • anonymous
if sine(x) = 3/4, find cos(2x). --how do you solve this?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
\[\sin^{-1} \frac{ 3 }{4 } = x \] After you solve for X plug it in to cos(2x)
anonymous
  • anonymous
Use the inverse of sin to solve for x, and then plug in (is the explanation).
anonymous
  • anonymous
thankyou that works! :)

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Jhannybean
  • Jhannybean
\[\large \sin(x)=\frac{3}{4} \implies \sin^{-1}(\frac{3}{4})=x\]\[\large \cos(2*(\color{red}{\sin^{-1}(\frac{3}{4})}) =?\]
Jhannybean
  • Jhannybean
There ya goooo. good job.

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