Establish the identity.
a. cscx * cosx = cotx
b. tanθ + cotθ = secθ cscθ

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"