Variable, because its a letter<span />
tenths because 42.02 it would be tenths the first decimal is tenths and second is hundreths
Answer:

Step-by-step explanation:
Recall the formula for the sine of the double angle:

we know that
, and that
is in the interval between 0 and 90 degrees, where both the functions sine and cosine are non-negative numbers. Based on such, we can find using the Pythagorean trigonometric property that relates sine and cosine of the same angle, what
is:

With this information, we can now complete the value of the sine of the double angle requested:

Answer:
.03%
Step-by-step explanation: