Question

tan 60- tan 15 / 1+ tan 60 tan 15​

Answer 1

Step-by-step explanation:

Tan (60– 15) = tan 60 - tan 15/ 1 + tan60 tan 15

As tan 45 is 1

So we get the answer

Tan (a-b) = tan a - tan b / 1+ tan a tan b

Tan (a+b) = tan a + tan b / 1 – tan a tan b

This is the formula