Rewrite with only sin x and cos x.
sin 2x - cos x

2 sin x cos2x
sin x
cos x (2 sin x - 1)
2 sin x

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

The ratios of boys to girls on a soccer league is 2: 5. if there are 28 boys, how many girls are playing soccer? extra points! will mark as brainiest asap