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Willow Pratt

Willow Pratt

Answered question

2022-07-03

prove that k = 1 n = 90 1 sin ( k 1 ) sin ( k ) = cos 1 sin 2 1

Answer & Explanation

cefflid6y

cefflid6y

Beginner2022-07-04Added 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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