Question

sol this trignometry question 4th ques​

Answer 1

Step-by-step explanation:

$tan \: A \: = \: cot \: B \\ tan \: A \: = \: tan \: (90 \degree \: - B ) \\ A \: = 90 \degree \: - B \\ A \: + B \: = 90 \degree \\ \\ \{\because \: cot \: \theta \: = tan \: (90 \degree \: - \theta ) \}$

Answer 2

Hi there !

tanA = cotB

To prove :- A + B = 90

tanA = cotB

tanA = tan(90°-B) ( CotA = tan(90°-A)

A = 90 - B

A +B = 90

Hence proved

Thankyou :)