Question

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

Answer 1

tan $\frac{3 \pi }{4} \neq -1$

Answer 2

Answer:

tan 3pi/4=-1

because 3pi/4= 135 degree

Step-by-step 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.