Secant is a trigonometric function that quantifies the quotient of hypotenuse and the side that is adjacent to the given angle. This is the reciprocal of the cosine function. cosine = adjacent / hypotenuse = x/h secant = h / x Secant equal to -1 means that x and h are numerically equal but opposite in sign. secant = -1 cosine = 1/secant =1/-1 = -1 arccos (-1) = 180° Thus, the answer to this item is 180°.
Find the exact value of the real number y. y = arcsec (-1)