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Prove that sqrt((1+cos 390^(@))/(1-cos 3...

Prove that `sqrt((1+cos 390^(@))/(1-cos 30^@)) = tan 60^@ + sec 60^@`

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`26^@ 34, 45''`
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Prove that sqrt((1+cos30^@)/(1-cos30^@))=sec 60^@+tan 60^@ .

Prove that sqrt((1+cos30^(@))/(1-cos30^(@)))=sec 60^(@)+tan60^(@) .

Prove that (1-tan^2 30^@)/(1+tan^2 30^@) = cos60^@

Prove that cos(60^(@)+A) + cos(60^(@)-A)-cosA=0

Prove that sin^2 30^@ + cos^2 30^@=1

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Prove that, (cos30^(@) - sin 20^(@))/(cos 40^(@) + cos20^(@)) = 4/sqrt3 cos40^(@) cos 80^(@)

CALCUTTA BOOK HOUSE-SAMPLE QUESTIONS PAPERS-QUESTION
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  14. If a+1/b = 1 and b+1/c=1 then prove that c+1/a =1

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