Which polynomial lists the powers in descending order?

D

Step-by-step explanation:

D is the only answer choice where the terms in the polynomials are descending in power, or their exponents. The powers are 7, 5, 4, 3, 0. The other answer choices have powers that aren't in descending order.

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