tentukan hasil dari (cos 110 + cos 130) contoh pengerjaan= cos 20 - cos 80= -2 Sin (20+80/2) sin (20-80/2) = -2 sin (100/2) sin (-60/2) =-2sin 50 sin (-30)-cos 40 =-2sin50 sin(-1/2) -cos 40 =sin 50 - sin 40 =sin (90-50) - sin 40 =sin 40-sin40 =0

kaitlinbuckridgeulv – January 01, 2023

tentukan hasil dari (cos 110 + cos 130)

contoh pengerjaan=
cos 20 - cos 80= -2 Sin (20+80/2) sin (20-80/2)
= -2 sin (100/2) sin (-60/2)
=-2sin 50 sin (-30)-cos 40
=-2sin50 sin(-1/2) -cos 40
=sin 50 - sin 40
=sin (90-50) - sin 40
=sin 40-sin40
=0

Jawaban:

cos 20 - cos 110= -2 Sin (20+130) sin (20-80/2)

= -2 sin (110/2) sin (130/2)

=-2sin 50 sin (-30)-cos 110

=-2sin50 sin(-1/2) -cos 130

=sin 50 - sin 110

=sin (90-50) - sin 130

=sin 40-sin40

=0

• maaf kalo salah
• jadikan jawaban terbaik

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