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Evaluate cos 48^(@) cos 42^(@) - sin48^(...

Evaluate `cos 48^(@) cos 42^(@) - sin48^(@) sin 42^(@)`

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To evaluate the expression \( \cos 48^\circ \cos 42^\circ - \sin 48^\circ \sin 42^\circ \), we can use the cosine of the sum of angles formula. The formula states: \[ \cos(A + B) = \cos A \cos B - \sin A \sin B \] ### Step-by-Step Solution: ...
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