Bantuin dong..:)
tentukan himpunan penyelesaian dari
cos 2x = sin 2x ; 0 ≤ x ≤180
tentukan himpunan penyelesaian dari
cos 2x = sin 2x ; 0 ≤ x ≤180
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sin 2x = cos 2x
sin 2x/cos 2x = 1
tan 2x = 1
tan 2x = tan 45°
Sehingga,
2x = 45° + k.180°
x = 22,5° + k.90°
Didapat:
x = {22,5° ; 112,5°}