Question

please help me in finding the right answer
please do not post any statements like I don't know and etc....​

Answer 1

Answer:

0

Explanation:

cos(-1710 degrees) ?

1. cos(-theta) = cos(theta)
2. cos(-1710 degrees) = cos(1710 degrees)

$\cos(5 \times 2\pi - 90 \ degrees) = \cos(90 \ degrees) \ = 0$

$\cos(2\pi - theta) = \cos(theta)$