Question

(sin 10°-cos80°)=?
(a) sin 10°
(b) cos 10°
(c) 1
(d) 0

Answer 1

Answer:

(D)

$0$

Step-by-step explanation:

$\sin(10) - \cos(80) \\ \sin(90 - 80) - \cos(80) \\ \cos(80) - \cos(80) = 0$