Question #bc976

1 Answer
bp
Feb 10, 2017

As explained below.

Explanation:

Angle #135^0# lies in the second quadrant, where cosine is negative and sine is positive. Thus tangent will also be negative.

For determining the value of tan 135, we have to see its reference angle. Reference angle is #45^0#. It is the angle that terminal side of 135, makes with x axis.

Thus numerical value of tan 135 would be same as that of tan 45, but since #135^0# is in second quadrant, hence tan 135 = -tan 45.

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