Evaluate using the substitution x = 2 tan -1 . The identities sin x = 2 sin
Question:
Evaluate 
using the substitution x = 2 tan-1 θ. The identities sin x = 2 sin x/2 cos x/2 and cos x = cos2 x/2 - sin2 x/2 are helpful.
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Let x 2 tan u so that u tan22 and sec r2 1 tan x2 1 u Also cos 22 11 ...View the full answer
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Related Book For 
Calculus Early Transcendentals
ISBN: 978-0321947345
2nd edition
Authors: William L. Briggs, Lyle Cochran, Bernard Gillett
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