Question

Prove that Cos 0 ° = 1​

Answer 1

Answer:

Cos(0) is 1 because the value of cosine is calculated as (base/hypotenuse). When the angle is assumed to be 0 then in that case base=hypotenuse. So, cos(0)=1. Though in case of 0° angle triangle is not formed, but it is assumed that the imaginary triangle with angle 0 is formed where base = hypotenuse.