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Will Flex For Pre-Cal Help! - May 10th 2010, 07:25 PM

Know anything about evaluating composite trigonometric functions? For example: the inverse of sin(sin(3pie/4)). You do? Excellent!

My main question is when the problem talks about "for every x in the interval (-π/2, π/2)" What interval is it talking about?

And would you care to explain how you would do the inverse of tan(tan(3π/5))?

I would appreciate your help and will post a picture of my arms flexed, or I'll just say thank you if you want that instead.
   
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Re: Will Flex For Pre-Cal Help! - May 10th 2010, 07:31 PM

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Originally Posted by Brandon View Post
Know anything about evaluating composite trigonometric functions? For example: the inverse of sin(sin(3pie/4)). You do? Excellent!

My main question is when the problem talks about "for every x in the interval (-π/2, π/2)" What interval is it talking about?

And would you care to explain how you would do the inverse of tan(tan(3π/5))?

I would appreciate your help and will post a picture of my arms flexed, or I'll just say thank you if you want that instead.
That interval is just the same as PI/2 < x < PI/2
It's just a different way of wording it...

Other than that, sorry, can't help you
I don't think we learned that, and even if I did, I didn't pay attention in that class (I love math, but pre-calc was just not fun at all).




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Re: Will Flex For Pre-Cal Help! - May 10th 2010, 07:34 PM

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That interval is just the same as PI/2 < x < PI/2
That doesn't make sense to me though, cause inverse of tan(tan(3π/5)) is supposed to be in a certain quadrant...like 0 to π/2 would be the first quadrant and so forth. But x being between the same number...doesn't really make sense to me.
   
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Re: Will Flex For Pre-Cal Help! - May 10th 2010, 07:52 PM

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Originally Posted by Brandon View Post
That doesn't make sense to me though, cause inverse of tan(tan(3π/5)) is supposed to be in a certain quadrant...like 0 to π/2 would be the first quadrant and so forth. But x being between the same number...doesn't really make sense to me.
Sorry, I have no idea
I have always hated Trig... This is no exception




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