Question

find the value of cos(-600)​

Answer 1

Answer:

☆ To Find :-

The value of cos600°

=> cos600° = (90 × 4 +60°)  

Here 600° lies in the 3rd quadrant and also the multiple of 90° is even

=> cos 600° = cos(90 ×4+ 60°)

=> cos 600° = - cos60°

=> cos 600° = -(1/2)

so ,

cos 600° = -1/2

Step-by-step explanation: plz mark as the brillant

Answer 2

Answer:

we know that cos(-x)=-cosx

cos(-600)=-cos600

=-cos(360+240)

=-cos (240)

-cos(180+60)

=-cos(-60)

=-(-1/2)

=1/2