If a = 9, B = 12, and C = $\frac { 4 } { 5 }$

question 35

Multiple Choice

If a = 9, b = 12, and c = 15, express cos A as a fraction in lowest terms.

• A) \(\frac { 4 } { 5 }\)
• B) \(\frac { 3 } { 5 }\)
• C) \(\frac { 5 } { 4 }\)
• D) \(\frac { 3 } { 4 }\)

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