Pertanyaan

sec 4 5 ∘ cos 1 5 ∘ = ...

$\frac{cos 1 5 ^{\circ}}{sec 4 5 ^{\circ}} = ...$

Ikuti Tryout SNBT & Menangkan E-Wallet 100rb

Habis dalam

Klaim

D. Kamilia

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

Pembahasan

Perhatikan bahwa

$begin mathsize 12px style table attributes columnalign right center left columnspacing 0px end attributes row cell fraction numerator cos invisible function application 15 degree over denominator sec invisible function application 45 degree end fraction end cell equals cell cos invisible function application 15 degree divided by sec invisible function application 45 degree end cell row blank equals cell cos invisible function application 15 degree divided by fraction numerator 1 over denominator cos invisible function application 45 degree end fraction end cell row blank equals cell cos invisible function application 15 degree times fraction numerator cos invisible function application 45 degree over denominator 1 end fraction end cell row blank equals cell cos invisible function application 15 degree cos invisible function application 45 degree end cell row blank equals cell 1 half open parentheses cos invisible function application open parentheses 15 degree plus 45 degree close parentheses plus cos invisible function application open parentheses 15 degree minus 45 degree close parentheses close parentheses end cell row blank equals cell 1 half open parentheses cos invisible function application 60 degree plus cos invisible function application open parentheses negative 30 degree close parentheses close parentheses end cell row blank equals cell 1 half open parentheses cos invisible function application 60 degree plus cos invisible function application 30 degree close parentheses end cell row blank equals cell 1 half open parentheses 1 half plus 1 half square root of 3 close parentheses end cell row blank equals cell 1 fourth plus 1 fourth square root of 3 end cell row blank blank blank end table end style$