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57.850884871788546
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90 \cos(90) + 90 \cdot 0.6427876096865394
Evaluate trigonometric functions in the problem
90\times 0+90\times 0.6427876096865394
Get the value of \cos(90) from trigonometric values table.
0+90\times 0.6427876096865394
Multiply 90 and 0 to get 0.
0+57.850884871788546
Multiply 90 and 0.6427876096865394 to get 57.850884871788546.
57.850884871788546
Add 0 and 57.850884871788546 to get 57.850884871788546.
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