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Himpunan Penyelesaian Dari cos (x – 34°) = ½ √2

By 5.12.20 Add Comment


JAWABAN: D

PEMBAHASAN:

cos (x – 34°) = ½ √2

cos (x – 34°) = cos 45°

Pertama

x – 34° = 45° + k.360°

x = 45° + 34° + k.360°

x = 79° + k.360°

x = 79°

Kedua

x – 34° = -45° + k.360°

x = -45° + 34° + k.360°

x = -11° + k.360

x = 349°

 

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