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kiruha [24]
3 years ago
11

3) Consider the sequence -11 ; 2sin3x ; 15; ...

Mathematics
1 answer:
nikklg [1K]3 years ago
6 0
First term=a=-11
U1=a=-11
U3=a+2d=15
-11+2d=15
2d=26
d=13
2sin3x - (-11)=d
2sin3x=2
sin3x=1
sin(3x)=sin(90)
3x=90
x=30 degrees
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