Question

Section (A) : Trigonometry and Function
A-1. f(x) = COS X + sin x. Find f(1/2)
A-2. If f(x) = 4x + 3. Find f(f(2))
​

Answer 1

When x = 1/2 f(x) cos(1/2) + sin(1/2)

A_2 : f(2) means value of f(x) at x=2 so f(2) = 4(2)+3 = 11

Nd now f(f(2)) = f(11) as f(2) = 11

Now f(11) = 4(11)+3 = 47