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If /A and /B are acute angles such that...

If `/_A` and `/_B` are acute angles such that `cos A=cos B`. then show that `/_A=/_B`.

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Let, CosA= (side ajacent A)/(Hypotenuse)
`=(AC)/(AB)`
Similarly,
...
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If A and B are positive acute angles and cos A = 1/7, cos B = 13/14 , then show that A-B=60^0 .

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