i have some questions i really need help with

sin3 A = 3sin A - 4sin^3 A

(Hint use sin3 A = sin(2a + a)

and

sin3 x / sin x - cos3 x / cos x = 2

please help im stuck (Crying)

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- Apr 25th 2009, 07:41 PMdave30001some trig functions
i have some questions i really need help with

sin3 A = 3sin A - 4sin^3 A

(Hint use sin3 A = sin(2a + a)

and

sin3 x / sin x - cos3 x / cos x = 2

please help im stuck (Crying) - Apr 25th 2009, 08:33 PMJhevon