Suppose ABC Is a Right Triangle with Sides of Lengths $\sin \mathrm { A }$

question 46

Multiple Choice

Suppose ABC is a right triangle with sides of lengths a, b, and c and right angle at C. Find the unknown side length using
the Pythagorean theorem and then find the value of the indicated trigonometric function of the given angle. Rationalize
the denominator if applicable.
-Find $\sin \mathrm { A }$ when $\mathrm { a } = 4$ and $\mathrm { b } = 5$ .

• A) \(\frac { \sqrt { 41 } } { 4 }\)
• B) \(\frac { 4 \sqrt { 41 } } { 41 }\)
• C) \(\frac { \sqrt { 41 } } { 5 }\)
• D) \(\frac { 5 \sqrt { 41 } } { 41 }\)

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