Matematika Sekolah Menengah Atas nilai (sin 7/6π + cos 2/3π) (sin 7/6 - cos 2/3π) adalah

reneeboganulv – June 05, 2023

nilai (sin 7/6π + cos 2/3π) (sin 7/6 - cos 2/3π) adalah

Jawaban:

sin 7/6π =sin 7(30°)=210°

= sin (180°+30°)

= - sin 30= -1/2

cos 2/3π

= cos 120°

= cos (180°-60°)

=- cos 60

=-1/2

(-1/2+(-1/2))(-1/2-(-1/2)

= 0 ✓

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