SOLUTION: Given sin (x+y)= sin x cos y + cos x sin y
and cos(x+y) = cos x cos y - sin x sin y
derive a formula for cot(x+y)
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Trigonometry-basics
-> SOLUTION: Given sin (x+y)= sin x cos y + cos x sin y
and cos(x+y) = cos x cos y - sin x sin y
derive a formula for cot(x+y)
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Question 1111747: Given sin (x+y)= sin x cos y + cos x sin y
and cos(x+y) = cos x cos y - sin x sin y
derive a formula for cot(x+y) Answer by Alan3354(69443) (Show Source):
