Find the areas of the triangles.

here,base=16*3+7/16

=55/16

=3.43

height =5*1+3/5

=8/5

=1.6

now use formula h*b/2

=3.43*1.6/2

=5.48/2

=2.74

Step-by-step explanation:

therefore area of triangle is 2.74

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

step-by-step explanation: