Pertanyaan

Bentuk cos 5 x + cos 3 x sin 5 x + sin 3 x senilai dengan...

Bentuk $\frac{sin 5 x + sin 3 x}{cos 5 x + cos 3 x}$ senilai dengan...

tan 2x
tan 4x
tan 8x
cotan 4x
cotan 8x

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I. Roy

Master Teacher

Mahasiswa/Alumni Universitas Negeri Surabaya

Jawaban terverifikasi

Pembahasan

$fraction numerator sin space 5 x plus sin space 3 x over denominator cos space 5 x plus cos space 3 x end fraction equals fraction numerator 2 sin space 4 x. cos space x over denominator 2 cos space 4 x. cos space x end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator horizontal strike 2 sin space 4 x horizontal strike. cos space x end strike over denominator horizontal strike 2 cos space 4 x. horizontal strike cos space x end strike end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals tan space 4 x$