Question

Evaluate :

1−2^30/1+2^30

Answer 1

Answer:

(−31)+−1−30

 = (−31)+30

  =−1

Answer 2

Answer:

Half

Step-by-step explanation:

1-tan²x/1+tan²x= cos2x

So, 1-tan²30°/1+tan²30°=cos2(30°)=cos(60°)=1/2