Question

if cos theta = -1 find theta

Answer 1

Answer:

thitha= 180 degree

Step-by-step explanation:

Answer 2

Answer:

Given, cosθ=1           ...(i)

But cos 0 degree  =1           ...(ii)

From equations (i) and (ii),

cosθ=cos 0 degree

 ∴θ=0 degree