If  a=6 in.  and  θ=45° , find the value of c. Round your answer to the nearest hundredth.

1 answer

To find the value of \( c \) given that \( a = 6 \) inches and \( \theta = 45^\circ \), we can use trigonometric relationships. However, the nature of \( c \) must be specified; generally, it could refer to the length of a side in a right triangle where \( a \) is one of the legs, and \( \theta \) is the angle opposite that leg.

For example, if we are referring to a right triangle, we would use the sine, cosine, or tangent functions. Assuming \( c \) is the hypotenuse, we can use the sine function:

\[ \sin(\theta) = \frac{\text{opposite}}{\text{hypotenuse}} = \frac{a}{c} \]

Substituting the known values:

\[ \sin(45^\circ) = \frac{6}{c} \]

Since \( \sin(45^\circ) = \frac{\sqrt{2}}{2} \):

\[ \frac{\sqrt{2}}{2} = \frac{6}{c} \]

Now, rearranging for \( c \):

\[ c = \frac{6}{\frac{\sqrt{2}}{2}} = 6 \cdot \frac{2}{\sqrt{2}} = \frac{12}{\sqrt{2}} \]

To rationalize the denominator:

\[ c = \frac{12 \sqrt{2}}{2} = 6\sqrt{2} \]

Now we need to evaluate \( 6\sqrt{2} \):

\[ \sqrt{2} \approx 1.414 \] \[ c \approx 6 \cdot 1.414 \approx 8.484 \]

Rounding to the nearest hundredth, we get:

\[ c \approx 8.48 \text{ in.} \]

Therefore, the value of \( c \) is \( \boxed{8.48} \) inches.