Question

how do I get from step 3 to step four? please explain.
sin x = opposite over hypotenuse
sin 45° = 50 over x
0.707106781 ≈ 50 over x
(0.707106781)x ≈ 50
x ≈ 70.71

Answer 1

step three to step four, you would need to find the square root of 0.707106781 and 50
Hope this helped :*