If sin(3x)= cos(x+6), what is value of x

[ Due to complementary relation between sin and cos. ]

The value of x = 21

logv3(x+2)=1

rewrite in exponential form:

logb(x) = y is equal to b^y =x

b = 3, y = 1

now solve for x:

3^1 = x+2)

x = 3-2

x = 1

see the picture for the graph.