Question

Find the value of $\cos 0^{\circ }+\sin {90}^{\circ }+\sqrt{2}\sin {45}^{\circ }$

Answer 1

$\cos 0^{\circ }+\sin {90}^{\circ }+\sqrt{2}\sin {45}^{\circ }$

$=1+1+\sqrt{2}\times \frac{1}{\sqrt{2}}$

$=1+1+1=3$