sin 2c =
x
5
sin c =
y
5
x = 5sin 2c y = 5sin c
x = 5(2sin c cos c) !!! double angle formula
x + y = 5(2sin c cos c) + 5sin c
= 5sin c(2 cos c +1)
Show that the height, h, of the A-frame is equal to the expression 5sinc(1+2cosc). Im not sure what to do.
1 answer