Set higher than x.

sin 10=x/7 .

x= 1.22 .

Sine, a mathematical term, is a kind of trigonometric function. In a right triangle, the ratio of the opposite side to the hypotenuse of any acute angle ∠A is called the sine of ∠A, which is abbreviated from the English word sine, that is, the opposite side/hypotenuse of Sina = ∠ A.