A Movie Theater Has A 15-foot-high Screen Located 5 Feet above your eye level.

Question

A Movie Theater Has A 15-foot-high Screen Located 5 Feet above your eye level.

If you sit x feet back from the screen, your viewing angle, find x

1. The screen is placed 5 ft above eye level.
2. The screen itself is 15 ft high.

Degree = Tan^-1 (15/x) - tan^-1 (5/x)

Find the derivative of degree

Equal it to 0 and solve for x

Answer 1

Since Tan^-1 (15/x) - tan^-1 (5/x) =0;

then " = "

15/x≠5/x

What angle does this formula represent?