Finn had 132 boards. He gave 29 boards to his neighbor and stacked all of his remaining boards into piles around his house. Each pile
contained 20 boards. Which equation can be used to find p, the
number of piles of boards Finn made?

Total Boards : 132

Remaining : 29

Each Pile contained : 20

Equation :

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