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Jika tan x=21​, tan y=31​, x dan y  merupakan sudut lancip, hitunglah: c. tan (2x+y)

Pertanyaan

Jika tan space x equals 1 halftan space y equals 1 thirdx dan y  merupakan sudut lancip, hitunglah:

c. tan space open parentheses 2 x plus y close parenthesesspace 

A. Armanda

Master Teacher

Mahasiswa/Alumni Universitas Indraprasta PGRI

Jawaban terverifikasi

Jawaban

 table attributes columnalign right center left columnspacing 0px end attributes row blank blank tan end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses 2 x plus y close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table.

Pembahasan

Sudut Rangkap pada Tangen

tan space 2 alpha equals fraction numerator 2 space tan space alpha over denominator 1 minus tan squared space alpha end fraction 

Jumlah Dua Sudut pada Tangen

tan space open parentheses alpha plus beta close parentheses equals fraction numerator tan space alpha plus tan space beta over denominator 1 minus tan space alpha space tan space beta end fraction 

Diketahui tan space x equals 1 halftan space y equals 1 thirdx dan y  merupakan sudut lancip (terletak di kuadran I), maka hasil dari tan space open parentheses 2 x plus y close parentheses adalah:

table attributes columnalign right center left columnspacing 0px end attributes row cell tan space open parentheses 2 x plus y close parentheses end cell equals cell fraction numerator tan space 2 x plus tan space y over denominator 1 minus tan space 2 x space tan space y end fraction end cell row blank equals cell fraction numerator begin display style fraction numerator 2 space tan space x over denominator 1 minus tan squared space x end fraction end style plus tan space y over denominator 1 minus open parentheses fraction numerator 2 space tan space x over denominator 1 minus tan squared space x end fraction times tan space y close parentheses end fraction end cell row blank equals cell fraction numerator begin display style fraction numerator 2 times begin display style 1 half end style over denominator 1 minus open parentheses begin display style 1 half end style close parentheses squared end fraction plus 1 third end style over denominator 1 minus open parentheses fraction numerator 2 times begin display style 1 half end style over denominator 1 minus open parentheses begin display style 1 half end style close parentheses squared end fraction times begin display style 1 third end style close parentheses end fraction end cell row blank equals cell fraction numerator begin display style fraction numerator 1 over denominator begin display style 3 over 4 end style end fraction plus 1 third end style over denominator 1 minus open parentheses fraction numerator 1 over denominator begin display style 3 over 4 end style end fraction times begin display style 1 third end style close parentheses end fraction end cell row blank equals cell fraction numerator begin display style 4 over 3 end style plus begin display style 1 third end style over denominator 1 minus open parentheses begin display style 4 over 3 end style times begin display style 1 third end style close parentheses end fraction end cell row blank equals cell fraction numerator begin display style 5 over 3 end style over denominator 1 minus begin display style 4 over 9 end style end fraction end cell row blank equals cell fraction numerator begin display style 5 over 3 end style over denominator begin display style 5 over 9 end style end fraction end cell row blank equals cell fraction numerator up diagonal strike 5 over denominator 3 end fraction cross times fraction numerator 9 over denominator up diagonal strike 5 end fraction end cell row blank equals 2 end table  

Jadi, table attributes columnalign right center left columnspacing 0px end attributes row blank blank tan end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses 2 x plus y close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table.

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