Question

1-tan²45°/1+tan²45° is equal to
A. tan 90°
B. 1
C. sin 45°
D. sin 0°

Answer 1

1-tan2 45/1+tan2 45

=1-(1)2/1+(1)2

=1-1/1+1

=0/2

=0

sin0

Answer 2

D. Sin 0°

Step-by-step explanation:

We know that tan 45° = 1

So 1 - tan²45°/ 1 + tan²45° = 1-1 / 1+ 1 = 0

Sin 0° = 0°

Hence  1 - tan²45°/ 1 + tan²45° = Sin 0°

Option D is the answer.