MCQ
The value of $\left(\sin 45^{\circ}+\cos 45^{\circ}\right)$ is :
- A$1$
- B$\frac{1}{\sqrt{2}}$
- C$\frac{\sqrt{3}}{2}$
- ✓$\sqrt{2}$
✓
Answer
Correct option: D.
$\sqrt{2}$
$\sin 45^{\circ}+\cos 45^{\circ}$
$=\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{2}}$
$=\frac{2}{\sqrt{2}}$
$=\sqrt{2}$
$=\frac{1}{\sqrt{2}}+\frac{1}{\sqrt{2}}$
$=\frac{2}{\sqrt{2}}$
$=\sqrt{2}$
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