If tan A=cot B, then A+B=ldots ldots ldots ldots

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8. Introduction to Trigonometry

easy

If $\tan A=\cot B,$ then $A+B=\ldots \ldots \ldots \ldots$

A

$30$

B

$60$

C

$90$

D

$180$

Solution

$\tan A=\cot B\,\, \therefore \tan A=\tan (90-B) \,\, \therefore A=90-B\,\,\, \therefore A+B=90$

Standard 10

Mathematics

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