Find the Exact Value $\cos \frac { 3 \pi } { 8 } + \cos \frac { \pi } { 8 }$

question 50

Short Answer

Find the exact value. $\cos \frac { 3 \pi } { 8 } + \cos \frac { \pi } { 8 }$

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Definitions:

Trumpet

A brass musical instrument with a flared bell and bright, penetrating tone, played by blowing into a mouthpiece.

Trumpet

A brass wind instrument with a flared bell and a bright, penetrating tone, played by blowing into a small mouthpiece.

Mouthpiece

A part of an instrument or device that is designed to be placed in or near the mouth.

Pyrotechnics

The art of making or displaying fireworks; also used metaphorically to describe impressive displays or performances.