If ∠ A and ∠ B are acute angles such that cos A = cos B, then
show that ∠ A = ∠ B.
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Answer:
according to questions
lets cos a=side a adjacent a÷hypotenuse
ac÷ab simply
cos b=side adjacent+b÷hypotenus
Bc÷ab
given that
cosA=cosB
Ac =Bc
ac=Bc
in triangle
angle opposite equal side are equal
angle b = angle a
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