hii guys ..
if angle A and B are acute angle such that cos a = cos b , then show angle A = B .???
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AndyStark:
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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
HOPE IT HELPS U DEAR.....
♧
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
HOPE IT HELPS U DEAR.....
♧
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thx u so much di
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