Question

find the area:
y=cos(3x)cosx
given points ((pi/6),0))

Answer 1

\[\int\limits_{0}^{pi/6}\cos(3x)\cos(x)\]

Answer 2

\[1/2\int\limits_{0}^{pi/6}\cos(2x)+\cos(4x)\]

Answer 3

\[1/2[(\sin(2x)/2) + (\sin(4x)/4)\]