Question

If tan(3x - 15) = 1 what is the value of x

Answer 1

tan (3x-15) =1

= 3x - 15 = 45

because tan45 = 1

3x -15 =45

3x = 60

x = 20

Answer 2

tan ( 3x - 15 ) = 1

We know that, tan 45° = 1

•°•

tan ( 3x - 15 ) = tan 45°

On comparing both sides,

3x - 15 = 45

3x = 45 + 15 = 60

x = 60 / 3

x = 20