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x=7.9487889634980735
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15 \cdot 0.5299192642332049 = x
Evaluate trigonometric functions in the problem
7.9487889634980735=x
Multiply 15 and 0.5299192642332049 to get 7.9487889634980735.
x=7.9487889634980735
Swap sides so that all variable terms are on the left hand side.
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