Sederhanakan (tan a - cot a) (sin a.cos a)
Matematika
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Pertanyaan
Sederhanakan (tan a - cot a) (sin a.cos a)
1 Jawaban
-
1. Jawaban Anonyme
TriGonoMetRi
(tan a - cot a)(sin a cos a)
= sin a cos a . tan a - sin a cos a . cot a
= sin a cos a . sin a/cos a - sin a cos a . cos a/sin a
= sin² a - cos² a
= - (cos² a - sin² a)
= - cos 2a