Question

solve it please.......​

Answer 1

Answer:

refer pic above please

Answer 2

Answer :

3pi/4 can be written as pi+pi/4

And pi+pi/4 comes in third quadrant where tanx is positive.

So above eqn. Becomes tan inverse (tan pi/4)

Which is equal to pi/4.

As tan inverse(tanx) is x under its principle values.