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Determine the exact value of the following with the help of SPECIAL TRIANGLES ONLY. An 22n 22n a) cos COS sin sin 9 18 9

Determine the exact value of the following with the help of SPECIAL TRIANGLES ONLY. An 22n 22n a) cos COS sin sin 9 18 9 18 (Hint: Use Compound Angle Formula) 11m b) tan 12 (Hint: Convert, split the angle and then use Compound Angle Formula)

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