Geometric properties involving angles

the answer is 288..

hope this

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol

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

3 3 6, because in every triangle the longer side is always shorter than the sum of the other two