Which function represents a reflection of f(x) = (2)x over the x-axis?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°

Which is an x-intercept of the graphed function? (0, 4) (–1, 0) (4, 0) (0, –1)