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Use the Power-Reducing Formulas
- cos⁡3x\cos ^ { 3 } x

Question 83

Multiple Choice

Use the Power-Reducing Formulas
- cos⁡3x\cos ^ { 3 } x


A) 34cos⁡x+14cos⁡3x\frac { 3 } { 4 } \cos x + \frac { 1 } { 4 } \cos 3 x
B) 34cos⁡x−14cos⁡3x−cos⁡2x\frac { 3 } { 4 } \cos x - \frac { 1 } { 4 } \cos 3 x - \cos 2 x
C) 34cos⁡x−14cos⁡3x\frac { 3 } { 4 } \cos x - \frac { 1 } { 4 } \cos 3 x
D) 34cos⁡x+14cos⁡3x+cos⁡2x\frac { 3 } { 4 } \cos x + \frac { 1 } { 4 } \cos 3 x + \cos 2 x

Correct Answer:

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