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Willow Pratt 2022-07-03 Answered
prove that k = 1 n = 90 1 sin ( k 1 ) sin ( k ) = cos 1 sin 2 1
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Answers (1)

cefflid6y
Answered 2022-07-04 Author has 13 answers
Hint
1 sin k sin ( k + 1 ) = sin 1 sin 1 sin k sin ( k + 1 ) = sin ( ( k + 1 ) k ) sin 1 sin k sin ( k + 1 ) = 1 sin 1 [ cot k cot ( k + 1 ) ]
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