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" (b) "4cos20^(@)-sqrt(3)cot20^(@)...

" (b) "4cos20^(@)-sqrt(3)cot20^(@)

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Calculate without using trigonometric tables: (a) 4cos20^(@)-sqrt(3)cot20^(@)

solve 4cos20^(@)-sqrt(3)cot20^(@)

Prove that (sin20^(@) + sin40^(@)) + (cos20^(@) + cos40^(@))=(sqrt(3)+1)cos10^(@)

Prove that (sin20^(@) + sin40^(@)) + (cos20^(@) + cos40^(@))=(sqrt(3)+1)cos10^(@)

(cos30^(@)-sin20^(@))/(cos40^(@)+cos20^(@))=(4)/(sqrt(3))cos40^(@)cos80^(@)

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

Find the value of 3cos20^(@)-4cos^(3)20^(@) .

Prove that sqrt(3) " cosec "20^(@)-sec 20^(@)=4

Prove that sqrt(3) " cosec "20^(@)-sec 20^(@)=4

Evaluate 4\ cos\ 20^0\ -sqrt(3)\ cot\ 20^0\ =