Posted by Crystal on Thursday, February 12, 2009 at 10:04pm.
How would you verify the identity?
- Pre-Cal (verifying trig identities) - bobpursley, Thursday, February 12, 2009 at 10:12pm
what is rad?
- Pre-Cal (verifying trig identities) - Crystal, Thursday, February 12, 2009 at 10:14pm
- thinking needed - bobpursley, Thursday, February 12, 2009 at 10:31pm
multiply both sides by the sqrt sinx
sinx-cosxsinx-sin^3x cosx=cos^3x sinx
Hmmm. This is telling me the identity does not exist, because sinx(1-2cosx) is not zero.
check my work. There has to be an error here, but I am certain this is (was ) leading somewhere.
- Pre-Cal (verifying trig identities) - Reiny, Thursday, February 12, 2009 at 10:38pm
I read your identity as
(sinx)^(1/2) - cosx - (sinx)^(5/2)*cosx = (cosx)^3 *(sinx)^(1/2)
I picked 30 degrees, and the
left side was NOT equal to the right side.
So the way you typed it, it is not an identity.
- Pre-Cal (verifying trig identities) - bobpursley, Thursday, February 12, 2009 at 10:48pm
- Pre-Cal (verifying trig identities) - John, Monday, February 8, 2010 at 9:59am
I think I have the same book as you Crystal... I have no clue how to solve this thing... :p
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