Latest exam Aptitude Question SOLUTION: If sides a and b are known, angle B equals? Now my book says that if we know a and b that A= Tan-1 a/b and also says that B = 90 - A. My problem is 90 - A is not a answer to this

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(#M40139270) EXAM Numerical Ability question Keep an EYE

If sides a and b are known, angle B equals? Now my book says that if we know a and b that A= Tan-1 a/b and also says that B = 90 - A. My problem is 90 - A is not a answer to this

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