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If tan. theta = tanh x cot y, tan.fai = tanh x tan y, prove that sin 20 sin 20 cosh 2x + cos
If tan. theta = tanh x cot y, tan.fai = tanh x tan y, prove that sin 20 sin 20 cosh 2x + cos 2y cosh 2x - cos 2y
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Calculus Early Transcendentals
Authors: James Stewart
7th edition
538497904, 978-0538497909
