What is the area of this face?

48

Step-by-step explanation:

The Width is 6 and the Height is 8 which means the surface area is 48.

You don´t add length because they asked for the area of that face not the area of the actual block.

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