Question

QUES. If ∠A and ∠B are acute angles such that cos A = cos B, then show that ∠ A = ∠ B.​

Answer 1

Step-by-step explanation:

by using the formula of transformations we can prove that

A=B

HENCE PROOVED

Answer 2

Step-by-step explanation:

cosA=cosB

i.e. , AC/AB = BC/AB ( cos¢ = B/H)

so, AC = BC

so angA = angB ( angles opposite to equal sides are equal)