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Trigonometric Ratios
Hard
Question
If U
n
= 2 cos nθ, then U
1
U
n
− U
n-1
is equal to -
Options
A.
U
n+2
B.
U
n+1
C.
U
2
U
n+1
D.
None of these
Solution
-
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Trigonometric Ratios
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