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find the length of the indicated side in each triangle. show your solution ​

Find The Length Of The Indicated Side In Each Triangle Show Your Solution class=

Sagot :

✒️TRIGONOMETRY

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[tex] \large\underline{\mathbb{ANSWER}:} [/tex]

[tex] \qquad \LARGE \:\: \rm a = 21 \: units [/tex]

*Please read and understand my solution. Don't just rely on my direct answer*

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[tex] \large\underline{\mathbb{SOLUTION}:} [/tex]

Use the cosine ratio to determine the length of a side adjacent to the given angle with a given hypotenuse.

  • [tex] \rm \cos \theta = \frac{adjacent}{hypotenuse} \\ [/tex]

  • [tex] \rm \cos 60\degree = \frac{a}{42} \\ [/tex]

  • [tex] \rm a = 42 \cdot \cos 60\degree [/tex]

Get the cosine value of 60° referring to the table of values.

  • [tex] \rm a = 42 \cdot \frac12 [/tex]

  • [tex] \rm a = 21 [/tex]

Therefore, the length of side a is 21 units

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(ノ^_^)ノ [tex] \large\qquad\qquad\qquad\tt 3 /1 /2022 [/tex]