Find y if the point (7, y) is on the terminal side of θ and cos(θ) = 7/25

Answer 1

y^2 + 7^2 = 25^2
y^2 = 625 - 49 = 576
y = 24

Answer 2

so y^2 + 7^2 = 25^2
y^2 = 576
y = ± √576 = ± 24