Hey guys, can you please help me with the following questions. Thanks
1) Show that
(2sin3A + 2 cos3 A) / (sin A + cos A ) = 2 – sin2A
if sin A + cos A does not equal 0
2) [sin A / (cos A + sin A) ] + [sin A / (cos A - sin A) = tan2A
3) (2tanA) / (1 + tan2A) = sin 2A
4) (sin 3A/sinA) -...