Question

please help!!
Find the area bounded by: x=0, x=pi/2, y=0 and y=cos x

Answer 1

Take calculus in use.

Answer 2

??

Answer 3

You know definite integration? Ever seen something like this:

\[\int\limits_a^bf(x).dx\] .....something like this?

Answer 4

What does the graph of cos(x) look like? where does pi/2 lie on the graph?