If you want to find a value for X from which

$\displaystyle sin^-1(x) = 0.8$

I have graphed this, and is $\displaystyle X = .916$

Any help please

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- Jan 26th 2009, 01:00 AMADYInv. Trig Function
If you want to find a value for X from which

$\displaystyle sin^-1(x) = 0.8$

I have graphed this, and is $\displaystyle X = .916$

Any help please - Jan 26th 2009, 02:01 AMmr fantastic
Your post makes no sense.

If you want to solve $\displaystyle \sin^{-1}x = 0.8 \Rightarrow x = \sin 0.8$ then use a calculator. I get x = 0.717 (correct to 3 decimal places) assuming you're measuring angle in radians.

Otherwise, please post the question exctaly as it appears in your book or wherever it is you got it from. - Jan 26th 2009, 02:49 AMADY
Apologises Mr F.

I was just clearly mashing the keypad lol.

Ok, so lets try again.

Explain how i can use the inv. trig functions on my calc to find a value of X. From $\displaystyle sin(X) = 0.8$

Thanks

- Jan 26th 2009, 02:54 AMmr fantastic