Sin 50- sin 10 dibagi cos 50-cos 10 adalah....

sin 50-sin10 : cos 50-cos 10=0,20390964

[tex] \frac{ \sin(50) - \sin(10) }{ \cos(50) - \cos(10) } \\ = \frac{2 \cos \frac{1}{2}(60) \sin \frac{1}{2}(40) }{ - 2 \sin \frac{1}{2} (60) \sin \frac{1}{2} (40) } \\ = \frac{2( \frac{1}{2} \sqrt{3} ) \sin(20) }{ - 2( \frac{1}{2}) \sin(20) } \\ = - \sqrt{3} [/tex]