Question

If the length of the hypotenuse in the given triangle is 1, what is the value of side AB?

• A. $\sin \theta$
• B. $\cos \theta$
• C. $\sec \theta$
• D. $\tan \theta$

Answer 1

The correct option is A $\sin \theta$

In the given triangle, $\frac{AB}{AC}=\sin \theta$
$\frac{BC}{AC}=\cos \theta$
Since the hypotenuse i.e., $AC=1$,

$AB=\sin \theta$
$BC=\cos \theta$