HELP!!

If theta is the smallest angle in a right triangle with side lengths of 3,4, and 5 units, then what does sin(theta) equal?

3/4
3/5
4/5
5/3

Respuesta :

It is 3/5, because, sin is opposite over hypotenuse. If you are finding the smallest angle, then opposite would be 3 (the smallest side) over 5 (the hypotenuse)

Answer:

3/5

Step-by-step explanation:

Givens

  • The right triangle has side lengths of 3, 4 and 5.
  • Angle theta is the smallest angle.

From this information, we can deduct that the hypothenuse is 5 units long, and legs are 3 and 4 units long.

So, if theta is the smallest angle, then

[tex]sin\theta=\frac{3}{5}[/tex]

Because this relation gives the following angle

[tex]\theta = sin^{-1}(\frac{3}{5} )\approx 37\°[/tex]

Which is the smallest angle, because the other one is

[tex]\alpha=sin^{-1}=\frac{4}{5}\approx 53\°[/tex]

Therefore, the right answer the second choice.