If cos. alpha + 2 cos. beta +3 cos. gama =0, sin. alpha + 2 sin....

Transcribed Image Text:

If cos. alpha + 2 cos. beta +3 cos. gama =0, sin. alpha + 2 sin. beta +3 sin. gama = 0, prove that (i) cos 3.alpha + 8 cos 33 + 27 cos 3y = 18 cos (a + B + y) (ii) sin 3a + 8 sin 3B + 27 sin 3y = 18 sin (a + B + y) (iii) cos (2a--y) + 8 cos (23-y-a) + 27 cos (2y--) = 18. If cos. alpha + 2 cos. beta +3 cos. gama =0, sin. alpha + 2 sin. beta +3 sin. gama = 0, prove that (i) cos 3.alpha + 8 cos 33 + 27 cos 3y = 18 cos (a + B + y) (ii) sin 3a + 8 sin 3B + 27 sin 3y = 18 sin (a + B + y) (iii) cos (2a--y) + 8 cos (23-y-a) + 27 cos (2y--) = 18.

Answer rating: 100% (QA)

The detailed ... View the full answer