Question

Value of cos(-2610)°

Answer 1

Step-by-step explanation:

First of all, cos(-2610) is written as

cos(2610) degrees.This is because cos(-x) is equal to cos(x).

Now divide 2610 by 360. The quotient in this case is 7 and the remainder is 90 (2610–2520=90).

So, cos(2610) = cos(360×7+90)

Since (360+x) lies in the first quadrant, cos is positive and as 360 is present, there will not be any change in function.

Therefore, cos(360×7+90)= cos90 = 0

So the answer is zero.

Answer 2

−0.7878445 is the answer

hope it is useful