a stands for alpha b stands for beta

a)cos(a+b)= b)2cos squared a - 1=

c)tan2a= d)sin1/2theta=

e)sin a=

1+ cos a

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- Jul 14th 2008, 12:35 PMDave19trig identities
a stands for alpha b stands for beta

a)cos(a+b)= b)2cos squared a - 1=

c)tan2a= d)sin1/2theta=

e)__sin a__=

1+ cos a - Jul 14th 2008, 02:39 PMtopsquark
For a) - d) use the link I gave in your other thread.

For e) what are you looking for? This is

right? There are any number of equivalent forms that we might create from this. I'm not sure which one you would be looking for?

-Dan