Question

Please help me grades are do today

Answer 1

28

Explanation:

`sin=(opp)/(hyp)`

`cos = (adj)/(hyp)`

`cos^(-1)\left((45)/(51)\right)`

which is 28.07 degree

`sin\left(28.07\right)=(x)/(51)`

x= 23.99

23.99+4=h=28