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Pertanyaan

sec x + tan x sec x − tan x ​ ​ = ....

  1. s e c space x plus tan space x

  2. c s c space x plus c o t space x

  3. s e c space x plus c s c space x

  4. s e c space x minus tan space x

  5. c s c space x minus c o t space x

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S. Indah

Master Teacher

Mahasiswa/Alumni Universitas Lampung

Jawaban terverifikasi

Jawaban

jawaban yang benar adalah D.

jawaban yang benar adalah D.

Pembahasan

Ingat! Sehingga, Oleh karena itu, jawaban yang benar adalah D.

Ingat!

table attributes columnalign right center left columnspacing 0px end attributes row cell tan space x end cell equals cell fraction numerator sin space x over denominator cos space x end fraction end cell row cell s e c space x end cell equals cell fraction numerator 1 over denominator cos space x end fraction end cell row cell sin squared x plus cos squared x end cell equals 1 end table

Sehingga,

table attributes columnalign right center left columnspacing 0px end attributes row cell square root of fraction numerator s e c space x minus tan space x over denominator s e c space x plus tan space x end fraction end root end cell equals cell square root of fraction numerator begin display style fraction numerator 1 over denominator cos space x end fraction end style minus begin display style fraction numerator sin space x over denominator cos space x end fraction end style over denominator begin display style fraction numerator 1 over denominator cos space x end fraction end style plus begin display style fraction numerator sin space x over denominator cos space x end fraction end style end fraction end root end cell row blank equals cell square root of fraction numerator begin display style fraction numerator 1 minus sin space x over denominator cos space x end fraction end style over denominator begin display style fraction numerator 1 plus sin space x over denominator cos space x end fraction end style end fraction end root end cell row blank equals cell square root of fraction numerator 1 minus sin space x over denominator 1 plus sin space x end fraction end root cross times square root of fraction numerator 1 minus sin space x over denominator 1 minus sin space x end fraction end root end cell row blank equals cell fraction numerator 1 minus sin space x over denominator square root of 1 minus sin squared x end root end fraction end cell row blank equals cell fraction numerator 1 minus sin space x over denominator square root of 1 minus left parenthesis 1 minus cos squared x right parenthesis end root end fraction end cell row blank equals cell fraction numerator 1 minus sin space x over denominator square root of cos squared x end root end fraction end cell row blank equals cell fraction numerator 1 minus sin space x over denominator cos space x end fraction end cell row blank equals cell fraction numerator 1 over denominator cos space x end fraction minus fraction numerator sin space x over denominator cos space x end fraction end cell row blank equals cell s e c space x minus tan space x end cell end table

Oleh karena itu, jawaban yang benar adalah D.

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