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Buktikan identitas trigonometri berikut. sin x 1 − cos x ​ + 1 − cos x sin x ​ = 2 cos ec x

Buktikan identitas trigonometri berikut.

        

  1. undefined 

  2. undefined 

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K. Putri

Master Teacher

Mahasiswa/Alumni Universitas Pendidikan Ganesha

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begin mathsize 14px style fraction numerator 1 minus cos space x over denominator sin space x end fraction plus fraction numerator sin space x over denominator 1 minus cos space x end fraction equals fraction numerator open parentheses 1 minus cos space x close parentheses open parentheses 1 minus cos space x close parentheses over denominator open parentheses sin space x close parentheses open parentheses 1 minus cos space x close parentheses end fraction plus fraction numerator open parentheses sin space x close parentheses open parentheses sin space x close parentheses over denominator open parentheses 1 minus cos space x close parentheses open parentheses sin space x close parentheses end fraction equals fraction numerator 1 minus 2 cos space x plus cos squared space x over denominator open parentheses sin space x close parentheses open parentheses 1 minus cos space x close parentheses end fraction plus fraction numerator sin squared space x over denominator open parentheses sin space x close parentheses open parentheses 1 minus cos space x close parentheses space end fraction equals fraction numerator 1 minus 2 cos space x plus cos squared space x plus sin squared space x over denominator open parentheses sin space x close parentheses open parentheses 1 minus cos space x close parentheses end fraction equals fraction numerator 1 minus 2 cos space x plus 1 over denominator open parentheses sin space x close parentheses open parentheses 1 minus cos space x close parentheses end fraction equals fraction numerator 2 minus 2 cos space x over denominator open parentheses sin space x close parentheses open parentheses 1 minus cos space x close parentheses end fraction equals fraction numerator 2 open parentheses 1 minus cos space x close parentheses over denominator open parentheses sin space x close parentheses open parentheses 1 minus cos space x close parentheses end fraction equals fraction numerator 2 over denominator sin space x end fraction equals 2 space cos e c space x end style 

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