Idon't have a clue
solve for x, 0° ≤ x ≤ 360°. write degree measurements in ascending order.

cos 2 x+cos²x=1 x =

First of all, we can use the double angle identity to write

The equation becomes

Divide both sides by 3 to get

And finally consider the square root of both terms (don't forget the double sign):

So, the solutions are

If you want x in [0,360], consider the equivalent angle

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17