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Trigonometri Contoh Menyederhanakan Pernyataan Trigonometri

Memperluas Pernyataan Trigonometri

$\cos (3 x)$

Langkah 1

Gunakan identitas sudut tiga untuk mengubah $\cos (3 x)$ menjadi $4 \cos^{3} (x) - 3 \cos (x)$ .

$4 \cos^{3} (x) - 3 \cos (x)$

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Menyederhanakan Pernyataan Trigonometri

Finding the Exact Value Finding the Value Using the Unit Circle Expanding Trigonometric Expressions Expanding Using Double-Angle Formulas Expanding Using Sum/Difference Formulas Simplify Using Pythagorean Identities Simplify by Converting to Sine/Cosine Inverting Trigonometric Expressions Finding the Trig Value of an Angle Expanding Using De Moivre's Theorem

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$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$