Verify the following identity.
1) sin(x+y)
__________ = tanx+tany
cosxcosy
2) Write cos3x in terms of cosx
I cannot figure out how to solve for identities they are so hard. Any help appreciated!:)
1) sin(x+y)
__________ = tanx+tany
cosxcosy
2) Write cos3x in terms of cosx
I cannot figure out how to solve for identities they are so hard. Any help appreciated!:)