Question

hii guys ..
if angle A and B are acute angle such that cos a = cos b , then show angle A = B .???

Answer 1

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Answer 2

HAI MATE........



it is very simple just open the values of cos A and cos B
cos A = AC/AB

cosB =  BC/AB

it is given cos A = cos B
then AC/AB = BC/AB

then AC = BC

then by property of angle opposite to equal side are equal

angle A = angle B

hence proved


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