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Salah satu penyelesaian dari bentuk cos ( 2 x + 10 ) ∘ = sin ( x + 20 ) ∘ untuk adalah…

 Salah satu penyelesaian dari bentuk untuk 0 to the power of degree less or equal than x less or equal than 180 to the power of degree adalah…

  1. {20o, 140o dan 280o}

  2. {20o, 150o}

  3. {60o}

  4. {20o}

  5. {20o, 140o}

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S. Nur

Master Teacher

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Ingat

Ingat cos space x equals sin space open parentheses 90 minus x close parentheses

sin space open parentheses 90 minus open parentheses 2 x plus 10 close parentheses close parentheses to the power of degree equals sin space open parentheses x plus 20 close parentheses to the power of degree 

table attributes columnalign right center left columnspacing 0px end attributes row cell sin space open parentheses 80 minus 2 x close parentheses to the power of degree end cell equals cell sin space open parentheses x plus 20 close parentheses to the power of degree end cell row cell 80 to the power of degree minus 2 x end cell equals cell x plus 20 to the power of degree space plus space k.360 to the power of degree end cell row cell 3 x end cell equals cell 60 to the power of degree plus space k.360 to the power of degree end cell row x equals cell 20 to the power of degree space plus space k.120 to the power of degree end cell row cell k space end cell equals cell space 0 space m a k a space x equals 20 to the power of degree end cell row cell k space end cell equals cell space 1 space m a k a space x equals 140 to the power of degree end cell end table

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