Pls solve it.

Asked by pb_ckt | 12th Jun, 2019, 02:36: PM

Expert Answer:

begin mathsize 16px style fraction numerator sin 7 straight x plus sin 5 straight x plus sin 9 straight x plus sin 3 straight x over denominator cos 7 straight x plus cos 5 straight x plus cos 9 straight x plus cos 3 straight x end fraction end style
begin mathsize 16px style equals fraction numerator sin 7 straight x plus sin 9 straight x plus sin 5 straight x plus sin 3 straight x over denominator cos 7 straight x plus cos 9 straight x plus cos 5 straight x plus cos 3 straight x end fraction end style
begin mathsize 16px style equals fraction numerator 2 sin 8 xcosx plus 2 sin 4 xcosx over denominator 2 cos 8 xcosx plus 2 cos 4 xcosx end fraction end style
begin mathsize 16px style equals fraction numerator 2 cosx left parenthesis sin 8 straight x plus sin 4 straight x right parenthesis over denominator 2 cosx left parenthesis cos 8 straight x plus cos 4 straight x right parenthesis end fraction end style
begin mathsize 16px style equals fraction numerator 2 sin 6 xcosx over denominator 2 cos 6 xcosx end fraction end style
= tan6x

Answered by Sneha shidid | 12th Jun, 2019, 05:03: PM