Find the Exact Values of the Indicated Trigonometric Functions $\cos B$

Multiple Choice

Find the exact values of the indicated trigonometric functions. Write fractions in lowest terms.
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Find $\cos B$ and $\cot B$ .

A) $\cos B = \frac { 40 } { 41 } ; \cot B = \frac { 40 } { 9 }$
B) $\cos \mathrm { B } = \frac { 41 } { 40 } ; \cot \mathrm { B } = \frac { 9 } { 40 }$
C) $\cos \mathrm { B } = \frac { 9 } { 40 } ; \cot \mathrm { B } = \frac { 40 } { 9 }$
D) $\cos B = \frac { 9 } { 41 } ; \cot B = \frac { 9 } { 40 }$