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50 \cdot 0.7986355100472928 - 20 = 4 \cdot 0
Evaluate trigonometric functions in the problem
39.93177550236464-20=4\times 0
Multiply 50 and 0.7986355100472928 to get 39.93177550236464.
19.93177550236464=4\times 0
Subtract 20 from 39.93177550236464 to get 19.93177550236464.
19.93177550236464=0
Multiply 4 and 0 to get 0.
\text{false}
Compare 19.93177550236464 and 0.
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