Find the Exact Value of the Expression Using the Provided $\cos ( \mathrm { s } + \mathrm { t } )$

question 245

Multiple Choice

Find the exact value of the expression using the provided information.
-Find $\cos ( \mathrm { s } + \mathrm { t } )$ given that $\cos s = \frac { 1 } { 3 }$ , with $\mathrm { s }$ in quadrant $\mathrm { I }$ , and $\sin t = \frac { 1 } { 4 }$ , with $\mathrm { t }$ in quadrant II.

• A) \(\frac { \sqrt { 15 } - 2 \sqrt { 2 } } { 6 }\)
• B) \(- \frac { \sqrt { 15 } + 2 \sqrt { 2 } } { 12 }\)
• C) \(\frac { \sqrt { 15 } - 2 \sqrt { 2 } } { 12 }\)
• D) \(- \frac { \sqrt { 15 } + 2 \sqrt { 2 } } { 6 }\)

Comprehend the periodic table elements and their characteristics.

Identify the structural differences and similarities between various atoms and elements.

Recognize how elements form compounds through ionic and covalent bonding.

Explain the significance of valence electrons in chemical bonding and reactions.

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