Tentukan nilai dari
sin 150° + cos 315º /
cos 270° – tan 210°
sin 150° + cos 315º /
cos 270° – tan 210°
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Jawab:
Penjelasan dengan langkah-langkah:
trigonometri
sudut relasi
nilai fungsi
__
soal
sin 150 = sin (180 -30)
= sin 30
= 1/2
cos 315 = cos (360 - 45)
= cos 45
= 1/2 √2
cos 270 = cos (360-90)
= cos 90
= 0
tan 210 = tan (180 +30)
= - tan 30
= - ¹/₃ √3