2 cos (1) - x) = sin(x) because they are cofunctions. Here is another proof using...

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2 cos (1) - x) = sin(x) because they are cofunctions. Here is another "proof" using the subtraction angle formula for cosine. We already know that cos cos(-x) COS 0 B2 )cos(x) + sin(17 2 cos(x) + 1 ) sin(x) sin(x) 0 X 2 cos (1) - x) = sin(x) because they are cofunctions. Here is another "proof" using the subtraction angle formula for cosine. We already know that cos cos(-x) COS 0 B2 )cos(x) + sin(17 2 cos(x) + 1 ) sin(x) sin(x) 0 X