Question

Question #90aac

Answer 1

`:. sinp~~0.4267.`

Explanation:

Using the Cosine Rule for `DeltaPQR,` we have,

`cosp=(Q^2+R^2-P^2)/(2QR),`

`=(144+289-64)/(2*12*17)=369/408~~0.9044.`

`:. sinp=sqrt(1-cos^2p)=sqrt(1-0.81796)=sqrt0.18204~~0.4267.`