[" 23.Evaluate "],[qquad ((sin47)/(cos43^(@)))+((cos30^(@))/(cot30^(@)))-(sin60^(-1))^(2)]

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Evaluate: ((sin47^(@))/(cos43^(@)))^(2)+((cos43^(@))/(sin47^(@)))^(2)-4cos^(2)45^(@)

sin60^(@).cos30^(@)+cos30^(@)*sin60^(@)

Evaluate: ((sin47^@)/(cos43^@))^2+((cos43^@)/(sin47^@))^2-4cos^2 45^@

Evaluate : (cot40^(@))/(tan50^(@))-(1)/(2)((cos30^(@))/(sin60^(@)))

Evaluate: ((sin47o)/(cos43o))^(2)+((cos43o)/(sin47o))^(2)-4cos^(2)45o

co60^(@)sin30^(@)+cos30^(@)sin60^(@) =___.

((cos30^(@)+sin60^(@))/(1+cos60^(@)+sin30^(@)))=(sqrt(3))/(2)

Evalutate : sin60^(@) cos 30^(@)+sin30^(@)cos 30^(@) .

"(1) "sin60^(@)cos30^(@)+sin30^(@)cos60^(@)

Prove that: (cos(60^(@)-A)+sin(30^(@)-A))/(cos(30^(@)-A)-sin(60^(@)-A))= cotA