Question

Sin 3x = cos x .
0 lebih kecil sma dg x lebih kecil sm dg 2phi

Answer 1

Sin 3x = cos x
sin 3x = sin(90 - x)
3x = 90 - x + k.360
4x = 90 + k.360
x = 22.5 + k.90
k = 0, x = 22.5
k = 1, x = 112.5
k = 2 ,x = 202.5
k = 3, x = 292.5

HP :{22,5, 112,5 , 202,5  , 292,5 }