F(x)=cosx+sinx find f(π/2)

Question

Its related to trigonometry and function as u can see so plz give step by step solution<3

Answer 1

You need to evaluate this equation at x = ∏/2

 

F(∏/2) = cos(∏/2) + sin(∏/2)

 

cos(∏/2)=0  and sin(∏/2) = 1, so plug these values into the equation.