Examples -> Geometry -> Trigonometry -> Simplifying trigonometric expressions

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Simplify the following expression:

1+ctg 2x·ctg xtgx + ctg x

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Simplify the following expression:

sin4α+cos2α+sin2α·cos2α

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Simplify the following expression:

cos2x-cos4x+sin4x

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Simplify the following expression:

tg2x-sin2x