Cos3 A - sin3 A-cos A - sin A - cos3 A-sin3 A-cos A-sin A

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Basic Trigonometric Identities

cos3 A + sin3...

Question

$\frac{{cos}^{3} A + {sin}^{3} A}{cos A + sin A} + \frac{{cos}^{3} A - {sin}^{3} A}{cos A - sin A}$

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\frac{S i n^{3} A + c o s^{3} A}{s i n A + c o s A} + \frac{S i n^{3} A - c o s^{3} A}{s i n A - c o s A} = 2

\frac{{c o s}^{3} A + {s i n}^{3} A}{c o s A + s i n A} + \frac{{c o s}^{3} A - {s i n}^{3} A}{c o s A - s i n A} = 2

\frac{{sin}^{3} A + sin 3 A}{sin A} + \frac{{cos}^{3} A - cos 3 A}{cos A}

$\frac{{cos}^{3} A - cos 3 A}{cos A}$ + $\frac{{sin}^{3} A - sin 3 A}{sin A} =$

sin A + sin 3A/ cos A + cos 3A = tan 2A

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