Evaluate the Integral $\int _ { 0 } ^ { \pi / 2 } \sin 9 t \sin 8 t d t$

question 124

Multiple Choice

Evaluate the integral.
- $\int _ { 0 } ^ { \pi / 2 } \sin 9 t \sin 8 t d t$

• A) \(\frac { 9 } { 17 }\)
• B) \(\frac { 16 } { 35 }\)
• C) \(\frac { 1 } { 2 }\)
• D) \(\frac { 8 } { 17 }\)

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