Posted by Anonymous on Monday, March 3, 2008 at 4:49pm.
Learn your identites well in order to prove these.
1. (1+sina) (1-sina)
= cos^2a (according to identity)
you know that sin^2b = 1-cos^2b, so:
3. sin^2a - sin^4a=
= sin^2a- (sin^2a)(sin^2a)
I hope you can do the rest by yourself ;)
------------- = csc^2B-sec^2B
Pre-Cal (verifying trig identities) - How would you verify the identity? sin^1/...
trig - express 20sin theta + 4 cos theta as R sin(theta + alpha) R sin(theta + ...
Pre Calc. - Use the sum or difference identity to find the exact value of sin255...
Trigonometry - I don't understand how I'm supposed set the problem up or...
calculus - Verify the identity cot2 beta/1+csc beta=1-sin beta/sin beta.
trig - evaluate the following in exact form, where the angeles alpha and beta ...
pre cal verifying identities - how do I verify?? sin(x)+cos3(x)=sin(x)-3cos(x)+...
trig - in proving trigonometric identities if 1 + sin^2 theta is equal to 2 sin^...
Trig Identities - Please help...I'm not understanding trig identities and ...
trig - If sin alpha = -3/5, sin beta = -5/13, P(alpha) is in the third quadrant...
For Further Reading