Could you help me with following trigonometric identity proofs question Verify Sin^2 u/2 = ( Sin^2 u + cos u - 1 ) Divided by ( 2 cos u )

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

How many terms does the polynomial x^2 y^2 have

Write the function for the graph. (1.8) (0,4)