Code to solve integral with cosine and theta

How do I solve the following equation in Matlab?

∫(cos^2(θ))dθ with pi/2 as the max and 0 as the min.

Answer 1

[Chunru]

• integrate it manually
• integrate it symbolically

syms x
f(x) = cos(x).^2

f(x) = 

int(f(x), 0, pi/2)

ans = 

• integrate it numerically

x = linspace(0, pi/2, 101);
trapz(x, cos(x).^2)

ans = 0.7854

[Rachel Bowlin]

Thank you!