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If A+B=90^0, prove that sqrt((tanAtanB+t...

If `A+B=90^0,` prove that `sqrt((tanAtanB+tanAcotB)/(sinAsecB)-(sin^2B)/(cos^2A))=tanA`

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RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS-All Questions
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  11. Prove that: (cos30^0+sin60^0)/(1+cos60^0+sin30^0)=(sqrt(3))/2

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  18. Evaluate : 4(sin^4 30^0+cos^4 60^0)-2/3(sin^2 60^0-cos^2 45^0)+1/2tan...

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  19. Evaluate : (sin50^0)/(cos40^0)+(cos e c40^0)/(sec50^0)-4cos50^0cos e ...

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