Question

How is tan (3pi/4) = -1?

Answer 1

tan
`(3 \pi )/(4) \\eq -1`

Answer 2

tan 3pi/4=-1

because 3pi/4= 135 degree

Explanation:

The tan of 3pi/4 radians is -1, the same as tan of 3pi/4 radians in degrees. To change 3pi/4 radians to degrees multiply 3pi/4 by 180° /pi = 135°. Tan 3pi/4 = tan 135 degrees.