Which double-angle or half-angle identity would you use to verify that 1+cos2a=2/1+tanx^2a? a. tan2a=2tana/1-tan^2a b. tana/2=+- sqaure root of 1-cosa/1+cosa c. cos2a=cos^2a-sin^2a d. cos2a=2cos^2a+1

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Jenny invests $2,000 at an interest rate of 5%. the amount of money, me, in jenny's account after tyears can be represented using the equation ma-2000(1.05). if jenny would have invested the same amount of money at the same interest rate four years ago, the equation representing the amount of money mo. in her account would be represented using the equation! mg = 2000(105)*** which of the following is equivalent to mp? 2000(105) om- 1.05 2000(1.05) mo 1059 mp-2000(1.05) (105) mp - 2000(1.05) + (1.05)