COLOR THEME a ZOOM
7. Triangle QRS is shown below. Using the
information given determine the measure of
ZR.
R
C
C
C
o
38.20
52.70
S
7.
CLEA

investment b is an ordinary annuity with $3,909.64 in the account after one year.

step-by-step explanation:

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