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Question
Evaluate the following: sin22° cos44° - sin46° cos68°
Sum
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Solution
sin22° cos44° - sin46° cos68°
= sin(90° - 68°) cos(90° - 46°) - sin46° cos68°
= cos68° sin46° - sin46° cos68°
= 0.
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Trigonometric Equation Problem and Solution
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