Pertanyaan

cos A − cos 2 A sin A + sin 2 A = ...

$\frac{sin A + sin 2 A}{cos A - cos 2 A} = ...$

F. Kurnia

Master Teacher

Mahasiswa/Alumni Universitas Jember

Jawaban terverifikasi

Pembahasan

Ingat hubungan, Maka

Ingat hubungan,

Maka

$fraction numerator sin invisible function application A plus sin invisible function application 2 A over denominator cos invisible function application A minus cos invisible function application 2 A end fraction equals fraction numerator 2 sin invisible function application 1 half open parentheses A plus 2 A close parentheses cos invisible function application 1 half open parentheses A minus 2 A close parentheses over denominator negative 2 sin invisible function application 1 half open parentheses A plus 2 A close parentheses sin invisible function application 1 half open parentheses A minus 2 A close parentheses end fraction rightwards double arrow fraction numerator 2 sin invisible function application 3 over 2 A cos invisible function application open parentheses negative 1 half A close parentheses over denominator negative 2 sin invisible function application 3 over 2 A sin invisible function application open parentheses negative 1 half A close parentheses end fraction rightwards double arrow fraction numerator 2 sin invisible function application 3 over 2 A cos invisible function application 1 half A over denominator 2 sin invisible function application 3 over 2 A sin invisible function application 1 half A end fraction rightwards double arrow cot invisible function application 1 half A$