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17. If 2 tana tan?ß tan?y + tan a tan-ß + tan B tany + tan?a tan?y 1 (a. B.y e R. a. B.y (2x+1) 5sin?o-Csino +3yino-3 Couo(che-iH 3(sh@-) where x is an integer) (A) sin?a + sin?B + sin2y 1 (B) cos2a + cos2B- cos2y 1 (C) cosa + cos B + cosy 2 (D) cos(a + B) cos(a-B) = cosy %3D Sing=T. %3D (AC)

17. If 2 tana tan?ß tan?y + tan a tan-ß + tan B tany + tan?a tan?y 1 (a. B.y e R. a. B.y (2x+1) 5sin?o-Csino +3yino-3 Couo(che-iH 3(sh@-) where x is an integer) (A) sin?a + sin?B + sin2y 1 (B) cos2a + cos2B- cos2y 1 (C) cosa + cos B + cosy 2 (D) cos(a + B) cos(a-B) = cosy %3D Sing=T. %3D (AC)

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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Ans. (A, C) Ssinto -2siuo -3. 17. If 2 tana tan?B tan?y + tan? a tanß +tan?B tany + tan?a tan2y 1 (a. ß.y e R, a. B. y = (2x+1) Csmo (che-iH3(sh@-) where x is an integer) (A) sin'a + sin B + siny = 1 (B) cos2a + cos2B - cos2y = 1 (C) cosa + cos ß + cosy = 2 (D) cos(a + B) cos(a - B) = cos?y sing= Ans. (AC) we=45 Qこno =ー3|5
Transcribed Image Text:Ans. (A, C) Ssinto -2siuo -3. 17. If 2 tana tan?B tan?y + tan? a tanß +tan?B tany + tan?a tan2y 1 (a. ß.y e R, a. B. y = (2x+1) Csmo (che-iH3(sh@-) where x is an integer) (A) sin'a + sin B + siny = 1 (B) cos2a + cos2B - cos2y = 1 (C) cosa + cos ß + cosy = 2 (D) cos(a + B) cos(a - B) = cos?y sing= Ans. (AC) we=45 Qこno =ー3|5
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