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If f(r) = cot + tan -1 4 -¹ (-) prove that f'(r) = 7² +4

If f(r) = cot + tan -1 4 -¹ (-) prove that f'(r) = 7² +4

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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4- If f(r) = cot-1 (²-). + tan-¹ ¹ (₁) 4 prove that f'(r) == ²+4
Transcribed Image Text:4- If f(r) = cot-1 (²-). + tan-¹ ¹ (₁) 4 prove that f'(r) == ²+4
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