Question

How do we determine so angles, like for example Tan 45 is 1. We know that, but tan 135 is -1. How can we say like that, is there any relation? PLS EXPLAIN IN DETAIL.. YOU CAN BE MARKED AS BRAINLIEST..thx in advance

Answer 1

Answer:

Depends on the quadrant

Step-by-step explanation:

tanx is positive in 3rd and 1st quads

all you need to find is the angle is in which quadrant

for that ,take the angle as the sum of any lesser standard angle like π/2 and integer multiples of it

for example 135° = 90° + 45°

which lies in 2nd quadrant so we can take that as

tan(90°+45°)= -cot(45°) = -1

Ask if you have any doubt