( sin x + cos x )(sin x - cos x )
Matematika
DanielUS
Pertanyaan
( sin x + cos x )(sin x - cos x )
2 Jawaban
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1. Jawaban Bobb123
= (sin x + cos x) (sin x - cos x)
= sin²x -cos²x
= sin²x - (1-sin²x)
= sin²x -1 + sin²x
= -1 + 2 sin²x -
2. Jawaban dnnyz07
[tex] (\sin x + \cos x )(\sin x - \cos x ) \\ = \sin ^2 x - \sin x \cos x + \sin x \cos x - \cos ^2 x \\ = \sin ^2 x - \cos ^2 x [/tex]