Please solve 41 st question

Asked by sinchanaandavan | 2nd Jan, 2022, 12:17: PM

Expert Answer:

2sin(4x) cosx + 2sin(8x) cosx = 2cosx(sin4x+sin8x) = 2cosx (2sin6x cos2x) = 4cosx cos2x sin6x

2cos(4x) cosx + 2cos(8x) cosx = 2cosx (cos4x + cos8x) = 2cosx (2cos6x cos2x) = 4 cosx cos2x cos6x
 
fraction numerator sin 3 x plus sin 5 x plus sin 7 x plus sin 9 x over denominator cos 3 x plus cos 5 x plus cos 7 x plus cos 9 x end fraction equals fraction numerator 4 cos x space cos 2 x space sin 6 x over denominator 4 cos x space cos 2 x space cos 6 x end fraction equals tan 6 x

Answered by Renu Varma | 3rd Jan, 2022, 11:41: AM