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Inverse Trig

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I need to simplify this expression. How do I go upon that? [tex]cos(sin^{-1}(9x))[/tex]
 
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I need to simplify this expression. How do I go upon that? [tex]cos(sin^{-1}(9x))[/tex]
What have you tried? Before we can help you, you need to have made an effort at solving the problem for yourself.
 

SammyS

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What have you tried? Before we can help you, you need to have made an effort at solving the problem for yourself.
I agree with Mark!
 

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