Which is a recursive formula for the sequence 65.4,0,-65.4, -110.8,
where f(1) = 65.4?

Hint: Find the pattern first. Is this an arithmetic or geometric sequence?

A f(n + 1) = f(n) + 65.4, n >=1
B f(n + 1) = f(n)-654, n=1
C (n + 1) = 65 4 f(n), n >=1
D f(n + 1) = -65.4 f(n),n>=1

x= 3^y

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