Evaluate the Trigonometric Function Using Its Period as an Aid $$\cos \frac { 9 \pi } { 4 }$$

question 2

Multiple Choice

Evaluate the trigonometric function using its period as an aid. $$\cos \frac { 9 \pi } { 4 }$$

• A)\(\cos \frac { 9 \pi } { 4 } = - \frac { \sqrt { 2 } } { 2 }\)
• B) \(\cos \frac { 9 \pi } { 4 } = - \sqrt { 2 }\)
• C) \(\cos \frac { 9 \pi } { 4 } = \sqrt { 2 }\)
• D) \(\cos \frac { 9 \pi } { 4 } = \frac { \sqrt { 2 } } { 2 }\)
• E) \(\cos \frac { 9 \pi } { 4 } = \infty\)

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Definitions:

Hydraulic

Relating to a system operated by the motion and pressure of fluids, used in various applications including machinery and vehicle brakes.

Integral

Essential or necessary for completeness; often used to describe parts that are built as a single unit.

Electrical

Pertaining to the technology of electricity, including its generation, transmission, distribution, and devices or systems that use electrical power.

Drum In Hat

A miniature drum brake assembly housed within the hat of a rear disc brake rotor to serve as the parking brake.