" (iv) "(sin11A sin A+sin7A sin3A)/(cos11A sin A+cos7A sin3A)=tan8A

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Prove the following : (sin11 A sin A +sin 7A sin 3A)/ (cos11A sin A + cos 7A sin3A)= tan 8A .

Prove that (sin 11 A sin A+sin 7A sin 3A)/(cos 11 A sin A+cos 7A sin 3A)=tan 8A

Prove that: quad (sin11As in A+s in7As in3A)/(cos11As in A+cos7A sin3A)=tan8A

Prove that: (sin11 A\ sin A+sin7A\ sin3A)/(cos 11\ A\ sin A+cos7Asin3A)=t a n8A

Prove the following: ("sin" 11A sin A+"sin" 7A sin 3A)/(cos 11A sin A+cos 7A sin 3A)="tan" 8A .

Show that: (sin11x sinx+sin7x sin3x)/(cos11x sinx + cos7x sin3x)=tan8x

(sin A sin2A + sin3A sin6A) / (sin A cos2A + sin3A cos6A) = tan5A

(sin3A+sin5A+sin7A+sin9A)/(cos3A+cos5A+cos7A+cos9A)=tan6A

(sin A sin2A + sin3A sin6A + sin4A sin13A) / (sin A cos2A + sin3A cos6A + sin4A cos13A) = tan9A

(sin A+sin3A+sin5A+sin7A)/(cos A+cos3A+cos5A+cos7A)=tan4A