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" 15.If "sec A=(5)/(4)," verify that "(3...

" 15.If "sec A=(5)/(4)," verify that "(3sin A-4sin^(3)A)/(4cos^(3)A-3cos A)=(3tan A-tan^(3)A)/(1-3tan^(2)A)}

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If secA=5/4 , verify that (3sinA-4sin^3A)/(4cos^3A-3cosA)=(3tanA-tan^3A)/(1-3tan^2A)

If sec A=(17)/(8), verify that (3-4sin^(2)A)/(4cos^(2)A-3)=(3-tan^(2)A)/(1-3tan^(2)A)

If secA=(17)/8 , verify that (3-4sin^2A)/(4cos^2A-3)=(3-tan^2A)/(1-3tan^2A)

If costheta=(8)/(17) ,verify that (3-4sin^(2)theta)/(4cos^(2)theta-3)=(3-tan^(2)theta)/(1-3tan^(2)theta) .

If costheta=(8)/(17) ,verify that (3-4sin^(2)theta)/(4cos^(2)theta-3)=(3-tan^(2)theta)/(1-3tan^(2)theta) .

Prove that (sin5A-sin3A)/(cos5A+cos3A)=tan A

Prove that: (sin5A-sin3A)/(cos5A+cos3A)=tan A(sin A+sin3A)/(cos A+cos3A)=tan2A

(sin 5x + sin 3x)/(cos 5x + cos 3x) = tan 4x

(sin 5x + sin 3x)/(cos 5x + cos 3x) = tan 4x

Prove that (sin 5x+sin3x)/(cos 5x+cos3x)=tan4x