Mathematics

Problem

For an acute angle

\theta

in a right triangle,

\cos\theta = \dfrac{5}{13}

. Which of the following could be the lengths of the side adjacent to

\theta

and the hypotenuse? a) Adjacent =

12\,\text{cm}

, Hypotenuse =

13\,\text{cm}

b) Adjacent =

5\,\text{cm}

, Hypotenuse =

13\,\text{cm}

c) Adjacent =

5\,\text{cm}

, Hypotenuse =

12\,\text{cm}

d) Adjacent =

10\,\text{cm}

, Hypotenuse =

15\,\text{cm}