1. if tan x/2 =m/n prove that m sin x +n cos x= n
2. solve the equation sin 7x =sin 3x
Answers
Answered by
8
Pre- requiste to understand my answer
1) Trigonometry of half angles and general solutions of sin x = sin Φ
cos x = [1 - tan^2 (x/2)]/[1 + tan^2(x/2)] ;
sin x = [2 tan (x/2)]/[1 + tan^(x/2)] ;
1) Trigonometry of half angles and general solutions of sin x = sin Φ
cos x = [1 - tan^2 (x/2)]/[1 + tan^2(x/2)] ;
sin x = [2 tan (x/2)]/[1 + tan^(x/2)] ;
Attachments:
Answered by
1
Answer:
bvxxxfn jcgssysydududhddfnjdducuddfjjciffduuduydydur
Similar questions