Find the Exact Values of the Indicated Trigonometric Functions $\sin \mathrm { A }$

Find the exact values of the indicated trigonometric functions. Write fractions in lowest terms.
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Find $\sin \mathrm { A }$ and $\cos \mathrm { A }$ .

A) $\sin \mathrm { A } = \frac { 4 } { 5 } ; \cos \mathrm { A } = \frac { 3 } { 5 }$
B) $\sin \mathrm { A } = \frac { 4 } { 3 } ; \cos \mathrm { A } = \frac { 3 } { 4 }$
C) $\sin \mathrm { A } = \frac { 5 } { 4 } ; \cos \mathrm { A } = \frac { 5 } { 3 }$
D) $\sin \mathrm { A } = \frac { 3 } { 5 } ; \cos \mathrm { A } = \frac { 4 } { 5 }$

Correct Answer:

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