Answer:
5) x = 5
6) x ≈ 51.47
Explanation:
It looks like you're being asked to solve for x the equations ...
- sin(30°) = x/10
- cos(39°) = 40/x
Solution
These are solved in the way any such equation is solved, though you need a calculator to find the values of the trig functions.
5) sin
Multiply by the denominator:
x = 10·sin(30°) = 5
6) cos
Multiply by x, then divide by cos(39°):
x = 40/cos(39°) ≈ 51.47