Question

Find the missing lengths.

I need help someone

Answer 1

Option A

Explanation:

From the triangle given in the picture,

By applying sine rule,

sin(60)° =
`\frac{\text{Opposite side}}{\text{Hypotenuse}}`

`(√(3) )/(2)=(a)/(7)`

a =
`(7√(3) )/(2)`

Similarly, by cosine rule,

cos(60)° =
`\frac{\text{Adjacent side}}{\text{Hypotenuse}}`

`(1)/(2)= (b)/(7)`

b =
`(7)/(2)`

Therefore, Option A will be the correct option.