Question

Given the known sides, solve for y

Answer 1

We conclude that:

• m∠y = 70.53°

Explanation:

From the given right-angled triangle,

• Hypotenuse is 15

• The angle is ∠y

• The adjacent to angle ∠y is 5

Using the trigonometric ratio,

cos y = adjacent / hypotenuse

substituting adjacent = 5, hypotenuse = 15

cos y = 5/15

cos y = 1/3

y = arc cos (1/3)

y = 70.53°

Therefore, we conclude that:

• m∠y = 70.53°