Identitas Perkalian dan Penjumlahan/Selisih Sinus dan Kosinus

8 Slides • 5 Questions

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Soal Evaluasi Pilihan Ganda

Silahkan kerjakan soal berikut ini dengan memilih salah satu jawaban yang paling tepat!

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Multiple Choice

Nilai dari 2 sin 165⁰ cos 15⁰ = ...

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-1

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$-\frac{1}{2}$

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$\frac{1}{2}$

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$\frac{1}{2}\sqrt{3}$

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1

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Multiple Choice

Nilai dari $2\ \cos\ \left(\frac{1}{4}\pi+a\right)\ \cos\ \left(\frac{1}{4}\pi-a\right)$ adalah ...

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cos 2a

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cos a

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1 - cos 2a

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$\frac{1}{2}\ \cos\ 2a$

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$\frac{1}{2}\ \cos\ a$

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Multiple Choice

4 cos 67,5⁰ cos 22,5⁰ = ...

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$\sqrt{2}$

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$\sqrt{3}$

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$\sqrt{6}$

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$1+\sqrt{2}$

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$1+\sqrt{3}$

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Multiple Choice

cos 160° sin 140° = …

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$-\frac{1}{4}\left(\sqrt{3}-2\ \sin\ 20\degree\right)$

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$-\frac{1}{4}\left(\sqrt{3}+\sin\ 20\degree\right)$

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$-\frac{1}{4}\left(\sqrt{3}+2\ \sin\ 20\degree\right)$

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$\frac{1}{4}\left(\sqrt{3}+\ \sin\ 20\degree\right)$

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$\frac{1}{4}\left(\sqrt{3}-2\ \sin\ 20\degree\right)$

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Multiple Choice

Hitunglah nilai di bawah ini tanpa menggunakan tabel trigonometri atau kalkulator $2\cos82\ \frac{1}{2}°\sin⁡37\ \frac{1}{2}°$

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$-\frac{1}{2}(√3-√2)$

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$\frac{1}{2}(√3-√2)$

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$\frac{1}{2}(√6+√4)$

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$-\frac{1}{2}(√6-√4)$

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$\frac{1}{2}(√3\ +√2)$

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