Question

Tolong dibantu dong
​

Answer 1

1

[tex] = 220° \times \frac{\pi}{180°} [/tex]

[tex] = \frac{220° \pi }{180°} [/tex]

[tex] = \frac{11\pi}{4} \: rad[/tex]

2

[tex] = sin \: 330°[/tex]

[tex] = sin \: (360° - 30°)[/tex]

[tex] = - sin \: 30°[/tex]

[tex] = - \frac{1}{2} [/tex]

3

tidak ada soalnya

4

[tex] = sin \: 30° + cos \: 90° - tan \: 45°[/tex]

[tex] = \frac{1}{2} + 0 - 1[/tex]

[tex] = \frac{1}{2} - 1[/tex]

[tex] = \frac{1}{2} - \frac{2}{2} [/tex]

[tex] = - \frac{1}{2} [/tex]

5

[tex] = sin \: 120° + cos \: 210° - tan \: 225° \\ [/tex]

[tex] = sin (180° - 60°) + cos(180° + 30°) - tan(180° + 45°) \\ [/tex]

[tex] = sin \: 60° - cos \: 30° - tan \: 45°[/tex]

[tex] = \cancel{\frac{1}{2} \sqrt{3}} \cancel{ - \frac{1}{2} \sqrt{3}} - 1[/tex]

[tex] = - 1[/tex]

6

[tex] = sin \: \frac{3\pi}{4} .sin \: \frac{\pi}{4} + cos \: \frac{3\pi}{4} .sin \: \frac{\pi}{4} [/tex]

[tex] = cos \: ( \frac{3\pi}{4} - \frac{\pi}{4} )[/tex]

[tex] = cos \: ( \frac{2\pi}{4} )[/tex]

[tex] = cos \: ( \frac{\pi}{2} )[/tex]

[tex] = cos \: ( \frac{180°}{2} )[/tex]

[tex] = cos \: (90°)[/tex]

[tex] = 0[/tex]

7

[tex]sin \: 60° = \frac{x}{15} [/tex]

[tex] \frac{1}{2} \sqrt{3} = \frac{x}{15} [/tex]

[tex]x = 15 \times \frac{1}{2} \sqrt{3} [/tex]

[tex]x = \frac{15}{2} \sqrt{3} [/tex]

[tex]tinggi \: tembok = \frac{15}{2} \sqrt{3} \: m[/tex]

8

[tex] = \frac{7}{6} \pi[/tex]

[tex] = \frac{7}{6} \times 180°[/tex]

[tex] = 210°[/tex]

9

[tex] = 315° \times \frac{\pi}{180°} [/tex]

[tex] = \frac{315°\pi}{180°} [/tex]

[tex] = \frac{7}{4} \pi \: rad[/tex]

10

[tex] = \frac{11}{6} \pi[/tex]

[tex] = \frac{11}{6} \times 180°[/tex]

[tex] = 330°[/tex]