Which statement is always true? a) the sine of an angle is equal to the sine of the angle's complement. b) the cosine of an angle is equal to the sine of the angle's supplement. c) the sine of an angle is equal to the cosine of the angle's complement. d) the cosine of an angle is equal to the cosine of the angle's supplement.

❤️ (geometry) does the construction demonstrate how to copy an angle correctly using technology a) yes; the distance between points a and f was used to create circle h b) yes; the distance between points f and g was used to create circle h c)no; the distance between points a and f was used to create circle h d) no; the distance between points f and g was used to create circle h

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)