(a) for what values of k does the function y = cos kt satisfy the differential equation 4y" = -25y? (b) for those values of k, verify that every member of the family of functions y = a sin kt + b cos kt is also a solution.

Find the value of the cosine for angle a

Use the distributive law to multiply. 3(4x + 5y + 6)

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.