Find the Sum of the Series A) $\cos \frac { 3 } { 4 }$

question 289

Multiple Choice

Find the sum of the series.
- $$\frac { 3 } { 4 } - \frac { 3 ^ { 3 } } { 4 ^ { 3 } \cdot 3 ! } + \frac { 3 ^ { 5 } } { 4 ^ { 5 } \cdot 5 ! } - \frac { 3 ^ { 7 } } { 4 ^ { 7 } \cdot 7 ! } + \ldots$$

• A) \(\cos \frac { 3 } { 4 }\)
• B) \(\sin \frac { 4 } { 3 }\)
• C) \(\sin \frac { 3 } { 4 }\)
• D) \(\ln \frac { 3 } { 4 }\)

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