Enter the expression 2cos2(θ)−1 , where θ is the lowercase greek letter theta. 2cos2(θ)−1 2 c o s 2 ( θ ) − 1 = nothing

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8