Question 318552
This is a right-angled triangle, with the base as the distance from the end of the landing strip, the height as 325 ft and a base angle of 7.5. 
A = 7.5°
C = 90°
a = 325

to find angle B the sum of all angles  in a triangle is 180°
7.5°+B+90°=180°
B = 82.5°
To find side b = tan(B)=opp/adj = tan(B)=AC/CB
AC=CB-tan(B)
AC=325-tan(82.5°)
Multiply 325 by 7.59573 
AC or b = 2468.61225

The shuttle landed 2468.61225 feet from the end of the landing strip or 2469 feet.