" 7."sin A=(1)/(11)

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

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

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

Find "sin" 7(1^(@))/(2),cos 7(1^(@))/(2) and "tan" 11(1^(@))/(4) .

Show that ( sin 5A + 2 sin 8A + sin 11A ) /( sin 8 A +2sin 11A + sin 14A ) = (sin 8A)/( sin 11A)

Show that (sin 5 A + 2 sin 8A + sin 11 A)/( sin 8A + 2 sin 11 A + sin 14 A) = (sin 8A)/(sin 11 A).

Evaluate each of the following: sin(sin^(-1)7/(25)) (ii) sin(cos^(-1)5/(13)) (iii) sin(tan^(-1)(24)/7)

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