Question

find the value of cos 1710​

Answer 1

Answer:

1

Step-by-step explanation:

cos1710˚

=cos(360˚×5 - 90˚)                   [complete revolutions will be cancelled]

=cos(-90˚)

=cos90˚                                    [cos(-x)=cosx]

=1

Answer 2

Answer:

cos(1710×π/180)

cos 19π/2

cos10π-π/2

cos-180/2

cos-90

O