Using a Sum or Difference Identity, Write the Following as an Expression

question 127

Multiple Choice

Using a sum or difference identity, write the following as an expression involving functions of x.
-Find $\cos \theta$ if $\sin \theta = - \frac { 5 } { 13 }$ and $\theta$ is in quadrant III.

• A) \(- \frac { 5 } { 12 }\)
• B) \(- \frac { 12 } { 13 }\)
• C) \(\frac { 12 } { 5 }\)
• D) \(- \frac { 13 } { 5 }\)

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Definitions:

Pelvic Girdle

The pelvic girdle is the bony structure located at the base of the spine that connects the torso and legs, providing support for the upper body.

Thoracic Vertebrae

The twelve vertebrae located in the mid-back region of the spine, forming part of the thoracic cage structure.

Foramina

Natural openings or holes in a bone through which nerves and blood vessels pass.

Articulate

In anatomy, to articulate is to form a joint where two bones are attached in a manner that allows movement.