Evaluate the Integral $\int _ { 0 } ^ { \pi / 2 } \cos 7 t \cos 6 t d t$

question 426

Multiple Choice

Evaluate the integral.
- $\int _ { 0 } ^ { \pi / 2 } \cos 7 t \cos 6 t d t$

• A) \(\frac { 9 } { 11 }\)
• B) \(\frac { 7 } { 13 }\)
• C) \(\frac { 7 } { 11 }\)
• D) \(\frac { 6 } { 13 }\)

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Definitions:

PERT/CPM

Project management tools used to schedule, organize, and coordinate tasks within a project, where PERT stands for Program Evaluation and Review Technique and CPM stands for Critical Path Method.

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