Question

Evaluate : (sin 77°/cos 13°)^2 +(cos 77°/sin 13°)^2 - 2 cos ^2 45°
plss answer fast​

Answer 1

Answer is 1. Hope this helps u.

Answer 2

Answer:

(sin 77°/cos 13°) ^2 +(cos 77°/sin 13°)^2 - 2 cos ^2 45°

(sin 77°/sin 77°) ^2+(cos 77°/cos 77°) ^2-(1/√2) ^2

(1) ^2+(1) ^2-2×1/2

1+1-1

=1