Complete the statement by referring to a graph of a trigonometric function. (a) As x → 𝜋, cos x → ? (b) As x → (𝜋/3)−, cos x → ?

Question

there are two parts of question

(a) As x → 𝜋, cos x → ?

(b) As x → (𝜋/3)−, cos x → ?

Answer 1

cos(x) approaches -1, as x approaches pi

cos(pi)= cos(180 degrees) = -1

cos(x) approaches 1/2 as x approaches pi/3

cos(pi/3) = cos(60 degrees) = 1/2