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problem solving for calculus of periodic functions: centre of the light cast by a...


New member
Apr 6, 2016
Q. The centre of the light cast by a light suspended by a chain 3m from a cathedral roof moves backwards and forwards across the floor with a speed of 2sin5.1t m/s. The light is 2m above the floor. Find an expression for the movement of the light, which is almost horizontal. Hence fin the greatest angle of the chain from the vertical.

since speed is 2sin5.1t
expression for the movement of the light is -2/5.1 cos5.1t???
the greatest angle is sin-1(3/2)?

both of my answer is wrong.