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Roland Waters 2022-06-25 Answered
How to simply: k = 1 100 ( 1 + 2 c o s 2 π .3 k 3 100 + 1 )?
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Answers (2)

plodno8n
Answered 2022-06-26 Author has 17 answers
HINT:
For sin y 0 ,,
1 + 2 cos 2 y = 1 + 2 ( 1 2 sin 2 y ) = sin 3 y sin y
Observe the Telescoping nature and use sin ( π u ) = + sin u

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Mohamed Mooney
Answered 2022-06-27 Author has 5 answers
1 + 2 cos 2 y k = 1 + 2 ( 1 2 sin 2 y k ) = sin 3 y k sin y k
y k = 3 k π 3 100 + 1
Product will reduce to
sin 3 y 100 sin y 1
Just observe
sin ( 3 π y 1 ) sin y 1

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