How do I correctly type in the following functions into matlab

∫▒[1+〖sin〗^2⁡θ csc⁡θ ] dθ

∫▒1/(1+sin⁡θ ) dθ

∫_( 0)^( π)▒〖sin⁡t dt〗

and

∫_( -π∕4)^(〖 π〗∕4)▒〖〖sec〗^2⁡θ dθ〗

for the first one i have tried: int(1+(sin*theta^2)*csc\theta)

for the second i tried: int(1/(1+sin\theta))

for the third i have tried:

syms x
f=(sin*t)
a=0
b=pi
int(f, a, b)

Answer 1

[Ameer Hamza]

This is correct syntax

syms theta t
f1 = 1 + sin(theta)^2*csc(theta);
f2 = 1/(1+sin(theta));
f3 = sin(t);
f4 = sec(theta).^2;

f1_int = int(f1, theta, 0, pi/2);
f2_int = int(f2, theta, 0, pi/2);
f3_int = int(f3, t, 0, pi);
f4_int = int(f4, theta, -pi/4, pi/4);