Help pls help pls

3.8 cm

Step-by-step explanation:

You use the tangent ration(opposite/adjacent)

tan(theta) = x/y

tan(19) = x/11

11 * tan(19) = x

Put this in a calculator and you get 3.7876 cm

we are told to round so you get 3.8 cm.

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