ABC is a right-angled triangle. Given that cos x = 3/4 and that the length of the side adjacent to the angle x is 9 cm,
work out the length of the hypotenuse.

Step-by-step explanation:

        cosФ = adjacent / hypotenuse

        cosФ =  3/4   =    adj / hyp              adjacent side = 9 cm

                     3 / 4  =   9 / hyp                solve for hyp

                     4 / 3  =   hyp / 9               i just inverted both sides they are still =

                                                              a simple example     1/2 = 1/2      2 = 2

                     9 (4/3) = 9 (hyp/9)           multiply both sides by 9

                         12    =  hyp                   doing the math

10/60

step-by-step explanation:

if you divide 10 by 60 the answer is 0.166666 while if you divide or solve the other problems it equals 0.6