buktika bahwa cos x(sec x -cos x )=sin kuadrat x
Matematika
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Pertanyaan
buktika bahwa cos x(sec x -cos x )=sin kuadrat x
1 Jawaban
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1. Jawaban Anonyme
cos x (sec x - cos x)
= cos x . sec x - cos x cos x
= cos x . 1/cos x - cos² x
= 1 - cos² x
= sin² x