Question

transforme em produto, y = senx + cosx

Answer 1

$y=\sin{x}+\cos{x}\\y=\cos{(\frac{\pi}{2}-x})}+\cos{x}\\y=2\cdot\cos{(\frac{\pi}{4})}\cdot\cos{(\frac{\pi}{4}-x)}\\y=\sqrt{2}\cdot\sin{(\frac{\pi}{4}+x)}$