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Question

$sin 57^{\circ} - cos 33^{\circ}$

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Solution

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$sin 57^{\circ} - cos 33^{\circ}$
= $sin (90 - 33)^{\circ} - cos 33^{\circ}$
= $cos 33^{\circ} - cos 33^{\circ}$
= $0^{o}$

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