Use a Sum or Difference Identity to Find the Exact $\sin 115 ^ { \circ } \cos 55 ^ { \circ } - \cos 115 ^ { \circ } \sin 55 ^ { \circ }$

question 427

Multiple Choice

Use a sum or difference identity to find the exact value.
- $\sin 115 ^ { \circ } \cos 55 ^ { \circ } - \cos 115 ^ { \circ } \sin 55 ^ { \circ }$

• A) \(\frac { 1 } { 2 }\)
• B) \(\frac { \sqrt { 3 } } { 2 }\)
• C) \(\frac { \sqrt { 3 } } { 3 }\)
• D) \(\frac { 23 } { 12 }\)

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Definitions:

Occipital Lobe

Positioned at the brain's posterior, this segment of the cerebral cortex is charged with the analysis of visual stimuli.

Frontal Lobe

is the part of the brain located at the front of each cerebral hemisphere, responsible for voluntary movement, expressive language, and managing higher level executive functions.

Cerebrospinal Fluid

A transparent, colorless fluid located in the brain and spinal cord, serving as a protective padding for the brain's cortex, offering fundamental mechanical and immunological defense.

Spinal Cord

The cylindrical bundle of nerve fibers and associated tissue that is enclosed in the spine and connects nearly all parts of the body to the brain.