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1 March, 13:43

A movie theater has a 24 -foot-high screen located 6 feet above your eye level. If you sit x feet back from the screen, your viewing angle, theta , is as given below. theta equals tangent Superscript negative 1 Baseline StartFraction 30 Over x EndFraction minus tangent Superscript negative 1 Baseline StartFraction 6 Over x EndFraction Find the viewing angle, in radians, at distances of 5 feet, 10 feet, 15 feet, 20 feet, 25 feet.

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  1. 1 March, 14:06
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    The viewing angles are as follows:

    For x=5 feet, θ = 0.529 radians

    For x=10 feet, θ = 0.708 radians

    For x=15 feet, θ = 0.726 radians

    For x=20 feet, θ = 0.691 radians

    For x=25 feet, θ = 0.640 radians

    Step-by-step explanation:

    The viewing angle is given as:

    θ = tan⁻¹ (30/x) - tan⁻¹ (6/x)

    where x is the distance between you and the screen.

    The question is asking us to find the viewing angle θ at various distances. The distance value needs to be substituted in the above equation in place of x. So,

    For x=5 feet:

    θ = tan⁻¹ (30/5) - tan⁻¹ (6/5)

    = 1.4056 - 0.8761

    θ = 0.529 radians

    For x = 10 feet:

    θ = tan⁻¹ (30/10) - tan⁻¹ (6/10)

    = 1.249 - 0.540

    θ = 0.708 radians

    For x = 15 feet:

    θ = tan⁻¹ (30/15) - tan⁻¹ (6/15)

    = 1.107 - 0.380

    θ = 0.726 radians

    For x = 20 feet:

    θ = tan⁻¹ (30/20) - tan⁻¹ (6/20)

    = 0.983 - 0.291

    θ = 0.691 radians

    For x = 25 feet:

    θ = tan⁻¹ (30/25) - tan⁻¹ (6/25)

    = 0.876 - 0.235

    θ = 0.640 radians
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