Which if the following is a consequence of the identity sin 2x=2(sin x)(cos x ) ?
a. sin y = (sin 1/2y)
b. sin 3y= 3( sin 2y)(cos y)
c. sin 4y= 2( sin 2y) ( cos 2y)
d. sin 4y= 4 ( sin 2y) ( cos 2y)
e. sin 8y= 2 ( sin 4y) (cos 2y)

On the first of each month, shelly runs a 5k race. she keeps track of her times to track her progress. her time in minutes is recorded in the table: jan 40.55 july 35.38 feb 41.51 aug 37.48 mar 42.01 sept 40.87 apr 38.76 oct 48.32 may 36.32 nov 41.59 june 34.28 dec 42.71 determine the difference between the mean of the data, including the outlier and excluding the outlier. round to the hundredths place. 39.98 39.22 0.76 1.21

Both the red and blue line segments stretch from the center of the circle to a point on the circle. the length of the blue segment is 5. how long is the red line segment?

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)