Question

tan69+tan66÷1-tan69tan66=-1​

Answer 1

Answer:

Hi ,

************************************

( tanA + tanB )/( 1 - tanAtanB

= tan(A+B )

************************************

( tan69+tan66)/(1-tan69tan66)

= tan( 69 + 66 )

= tan 135

= tan ( 90 + 45 )

= - cot 45

= -1

I hope this helps you.

: )