Use the Given Information to Find the Exact Value of the Expression

question 90

Multiple Choice

Use the given information to find the exact value of the expression.
- $\sin \alpha = \frac { 20 } { 29 } , \alpha$ lies in quadrant $\mathrm { I }$ , and $\cos \beta = \frac { 4 } { 5 } , \beta$ lies in quadrant I $\quad$ Find $\cos ( \alpha + \beta )$

• A) \(\frac { 24 } { 145 }\)
• B) \(\frac { 144 } { 145 }\)
• C) \(\frac { 17 } { 145 }\)
• D) \(\frac { 143 } { 145 }\)

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