Jawab:
Penjelasan dengan langkah-langkah:
2. sin 150 = sin(180-30) = sin 30 = 1/2
cos 150 = cos (180-30) = cos 30 = [tex]-\frac{\sqrt{3} }{2}[/tex] (ingat aturan yg ada di kuadran I II III dan IV)
tan 150 =sin 150 / cos 150 = [tex]-\frac{1}{\sqrt{3} }[/tex]
3. sin 210 = sin (180+30) =sin 30 =-1/2
cos 210 = cos (18+30) =cos 30 = [tex]-\frac{\sqrt{3} }{2}[/tex]
tan 210 = sin 210/cos210 = [tex]\frac{1}{\sqrt{3} }[/tex]
4. sin 225 = sin(180+45) = sin 45 = [tex]-\frac{\sqrt{2}}{2}[/tex]
cos 225 = cos (180)+45 = cos 45 =[tex]-\frac{\sqrt{2}}{2}[/tex]
tan 225 = sin 225 / cos 225 = 1
6. sin 315 = sin (360-45) = sin 45 = [tex]-\frac{\sqrt{2}}{2}[/tex]
cos 315 = cos(360-45)=cos 45 = [tex]\frac{\sqrt{2}}{2}[/tex]
tan 315 = sin 351 / cos 315 = -1
7. sin 330 = sin (360-30)=sin 30=[tex]-\frac{1}{2}[/tex]
cos 330=cos(360-30)=cos30=[tex]\frac{\sqrt{3} }{2}[/tex]
tan 330=sin 330/cos 330 =[tex]-\frac{1}{\sqrt{3} }[/tex]
Hanya terjawab sebagian, semoga membantu
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