MCQ
The complement of $(90^{\circ} - a)$ is:
- ✓$a^{\circ}$
- B$-a^{\circ}$
- C$90^{\circ}$+ a
- D$90^{\circ}$ - a
✓
Answer
Correct option: A.
$a^{\circ}$
Two angles, whose sum is$ 90^{\circ}$, are called the complementary angle.Let x is a complimentary angle of $(90^{\circ} - a)$
$x+\left(90^{\circ}-a\right)=90^{\circ}$
$x=90^{\circ}-\left(90^{\circ}-a\right)$
$x=90^{\circ}-90^{\circ}+a$
$x=a^{\circ} .$
$x+\left(90^{\circ}-a\right)=90^{\circ}$
$x=90^{\circ}-\left(90^{\circ}-a\right)$
$x=90^{\circ}-90^{\circ}+a$
$x=a^{\circ} .$
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