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November 6th, 2011, 09:43 AM   #1
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Trig identities

1. Prove:

1)

2)

and

2. If prove that
 
 
November 6th, 2011, 02:47 PM   #2
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2. You need to know that the angles are in the first quadrant, so that
and so that
It follows that
skipjack is offline  
November 6th, 2011, 04:49 PM   #3
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Re: urgent help

Hello, noki!

Quote:



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Quote:

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November 7th, 2011, 12:41 AM   #4
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Re: urgent help

Woow! thanks a lot.
 
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