Penjelasan dengan langkah-langkah:
1).
[tex]sin(alpha) = \frac{depan}{miring} = \frac{BC}{AB} [/tex]
[tex]cos(alpha) = \frac{samping}{miring} = \frac{AC}{AB} [/tex]
[tex]tan(alpha) = \frac{depan}{samping} = \frac{BC}{AC} [/tex]
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[tex]sin(beta) = \frac{depan}{miring} = \frac{AC}{AB} [/tex]
[tex]cos(beta) = \frac{samping}{miring} = \frac{BC}{AB} [/tex]
[tex]tan(beta) = \frac{depan}{samping} = \frac{AC}{BC} [/tex]
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Maka jawaban yang tepat adalah opsi D.
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2.
[tex] \boxed{cos(alpha) = \frac{samping}{miring} = \frac{1}{ \sqrt{ {( \sqrt{3}) }^{2} + {(1)}^{2} } } = \frac{1}{ \sqrt{4} } }[/tex]
[tex]\boxed{cos(alpha) = \frac{1}{ \sqrt{4} } = \frac{1}{2} }[/tex]
Maka jawaban yang tepat adalah opsi D.
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