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If and , what is the value of ?

Draw a diagram.

Coordinate plane, with right triangle, such that the horizontal leg, labeled negative 2, is on x axis, from origin to, x, = negative 2,  vertical leg, labeled negative 1, from (negative 2, comma 0) to (negative 2, comma negative 1), and hypotenuse from (negative 2, comma negative 1) to the origin.