Nilai cos 210⁰ + sin 135⁰ + tan 240⁰ = . . . .
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Jawaban:
[tex] \frac{1}{2} ( \sqrt{3} + \sqrt{2} )[/tex]
Penjelasan dengan langkah-langkah:
cos 210° + sin 135° + tan 240°
= cos (180+30°)+sin (180-45)+tan(180°+60°)
= -cos 30° + sin 45° + tan 60°
= -1/2 akar 3 + 1/2 akar 2 + akar 3
= 1/2 akar 3 + 1/2 akar 2
[tex] = \frac{1}{2} ( \sqrt{3} + \sqrt{2} )[/tex]
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