Hello, xoAlina!
I assume you know all the half- and double-angle identities . . .
The right side is: .
The right side is: .
Multiply by
Multiply by
. .
The best way for this one is a sum-to-product identity:
. .
Then: .
Hi there it would be greatly appreciated if someone could help me out with a few things to do with double angles and proving trig identities:
These are some of my hw questions:
tanx=csc2x-cot2x
1-sin2x=1-tanx
cos2x 1+tanx
sin4x-sin2x = cos3x
sin2x cosx
I seem to start theses problems okay but then i end up getting suck just because im unsure of what i can or cant do
Can someone please help with full solutions just so i can get a better understanding for tomorrow
Thanks