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Use the Power-Reducing Formulas
- sin4x\sin ^ { 4 } x

Question 61

Multiple Choice

Use the Power-Reducing Formulas
- sin4x\sin ^ { 4 } x


A) 3812cos2x+18cos4x\frac { 3 } { 8 } - \frac { 1 } { 2 } \cos 2 x + \frac { 1 } { 8 } \cos 4 x
B) 3232cos2x\frac { 3 } { 2 } - \frac { 3 } { 2 } \cos 2 x
C) 322cos2x+12cos4x\frac { 3 } { 2 } - 2 \cos 2 x + \frac { 1 } { 2 } \cos 4 x
D) 38+58cos2x\frac { 3 } { 8 } + \frac { 5 } { 8 } \cos 2 x

Correct Answer:

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