Solve for a
a=15.4510203969131824
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0.9656887748070739 = \frac{a}{16}
Evaluate trigonometric functions in the problem
0.9656887748070739\times 16=a
Multiply both sides by 16.
15.4510203969131824=a
Multiply 0.9656887748070739 and 16 to get 15.4510203969131824.
a=15.4510203969131824
Swap sides so that all variable terms are on the left hand side.
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