Question

Which of the following equations models the relationship of angle A to the length of the line segment BC in the figure below.

Answer 1

Let the line segment BD be x, then sin A = x/15
or, x = 15sinA
Also
`y^(2) = x^(2) + (25)^(2) \\ = (15sinA)^(2) + 625 \\ =225 sin^(2) A+625 \\ y= \sqrt{225 sin^(2) A+625}`
The last option