if the cos inverse of x= pie/3 what is the sin inverse of x ?

- stapel_eliz
**Posts:**1628**Joined:**Mon Dec 08, 2008 4:22 pm-
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theshadow wrote:if the cos inverse of x= pie/3 what is the sin inverse of x ?

I'm going to guess that you don't mean , but just . (The Greek letter used to represent the geometrical value approximated by 3.14159 is spelled "pi"; a "pie" is a baked dessert.)

Use the definition of inverse trig functions: If cos

Remembering the reference-angle values you've memorized, what is the value of cos((pi)/3)? So what is the value of "x"?

You now need to find sin

If you get stuck, please reply showing how far you have gotten. Thank you!

cos((pi)/3) = 1/2, so i'm just taking sin inverse of 1/2?

- stapel_eliz
**Posts:**1628**Joined:**Mon Dec 08, 2008 4:22 pm-
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