Question

prove that cos 0 equal to 1​

Answer 1

Answer:

Hey mate here is your answer....

cos theta = Hypotenuse/Base

When angle is 0° then hypotenuse=base

hence cos 0 = base/base = 1

Hope it helps you....

Answer 2

Answer:

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In terms of the right triangles used to define trigonometric functions, cos(x)=adjacent sidehypotenuse . When x=0 , adjacent side length=hypotenuse length . Therefore, cos(0)=1 .