Question

Find the angle y to the nearest degree:

cos y° = (7/19)

If anyone could also explain how, that would be great.

Answer 1

y=68.38172757

Explanation:

Take the inverse cosine of both sides of the equation to extract

y from inside the cosine.

y=arccos(7/19)

y=68.38172757

The cosine function is positive in the first and fourth quadrants. To find the second solution, subtract the reference angle from

360 to find the solution in the fourth quadrant. y=360−68.38172757

y=68.38172757+360n,291.61827242+360n, for any integer n