Free brainliest! ** ** use the equation to find the length of the missing leg measure. a^2 + 16^2 = 20^2 1. evaluate powers: a^2 + 256 = 400 2. undo addition: a^2 = 144 3. undo the square: a= 144 ( square root ) what is the length of the missing leg measure? a = units

Subtracting 256 from both sides

Taking squareroot both sides

Therefore length of missing leg is

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92