Pertanyaan

Nilai dari cos 21 0 ∘ + cos 30 0 ∘ sin 12 0 ∘ + sin 15 0 ∘ = ⋯

Nilai dari $\frac{sin 12 0 ^{\circ} + sin 15 0 ^{\circ}}{cos 21 0 ^{\circ} + cos 30 0 ^{\circ}} = \dots$

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S. Nur

Master Teacher

Jawaban terverifikasi

Pembahasan

$begin mathsize 14px style fraction numerator sin space 120 degree plus sin space 150 degree over denominator cos space 210 degree plus cos space 300 degree end fraction equals fraction numerator s in space left parenthesis 180 minus 60 right parenthesis degree plus sin space left parenthesis 180 minus 30 right parenthesis degree over denominator cos space left parenthesis 180 plus 30 right parenthesis degree plus cos space left parenthesis 360 minus 60 right parenthesis degree end fraction end style$

$begin mathsize 14px style equals fraction numerator sin space 60 degree plus sin space 30 degree over denominator negative cos space 30 degree plus cos space 60 degree end fraction end style$

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