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Penyelesaian dari 2 (cos ( x - 10 0 ) )-1=0 2 ( cos ( x − 1 0 0 ) ) − 1 = 0 untuk 0 < x < 90 adalah ...

Penyelesaian dari   untuk  adalah ...

  1. 20 to the power of 0

  2. 30 to the power of 0

  3. 40 to the power of 0

  4. 50 to the power of 0

  5. 70 to the power of 0

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H. Eka

Master Teacher

Mahasiswa/Alumni Universitas Pendidikan Indonesia

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Pembahasan

begin mathsize 12px style 2 left parenthesis cos space open parentheses x minus 10 to the power of 0 close parentheses right parenthesis minus 1 equals 0 space ⟺ space 2 space left parenthesis cos space open parentheses x minus 10 to the power of 0 close parentheses right parenthesis equals 1 ⟺ cos space open parentheses x minus 10 to the power of 0 close parentheses equals 1 half ⟺ cos space open parentheses x minus 10 to the power of 0 close parentheses equals cos space 60 to the power of 0 ⟺ x minus 10 to the power of 0 equals plus-or-minus 60 to the power of 0 plus k.360 to the power of o ⟺ x minus 10 to the power of o equals negative 60 to the power of o plus k.360 to the power of o ⟺ x equals negative 50 to the power of 0 plus k.360 to the power of o u n t u k space k equals 1 ⟺ x equals 310 to the power of o space left parenthesis t i d a k space m e m e n u h i right parenthesis s e d a n g k a n space u n t u k space colon ⟺ x minus 10 to the power of o equals 60 to the power of o plus k.360 to the power of o ⟺ x equals 70 to the power of 0 plus k.360 to the power of o u n t u k space k equals 0 ⟺ x equals 70 to the power of o J a d i comma space p e n y e l e s a i a n n y a space a d a l a h space 70 degree. end style

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