Nilai dari 2 sin (-30°) cos(-135°)=
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Pertanyaan
Nilai dari 2 sin (-30°) cos(-135°)=
1 Jawaban
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1. Jawaban ShySkySpy
sin(-30) = sin(360-30)=sin330= - 1/2
cos (-135) = cos (360-135) = cos 225 = -1/2akar2
2sin(-30)cos(-135)
= 2.-1/2.-1/2akar2
=1/2akar2