Question

Sin70°+Sin20°/Cos25°

Answer 1

$\frac{sin70+sin20}{cos25}= \frac{2sin \frac{70+20}{2}cos \frac{70-20}{2} }{cos25}= \\ = \frac{2sin45cos25}{cos25}=2sin45=2* \frac{ \sqrt{2} }{2} = \sqrt{2}$