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[" 11."cos^(2)52(1)/(2)^(@)-sin^(2)22(1)...

[" 11."cos^(2)52(1)/(2)^(@)-sin^(2)22(1)/(2)^(@)=],[[" A) "(sqrt(3)+1)/(4sqrt(2))," B) "(sqrt(3)-1)/(4sqrt(2))," C) "(3+sqrt(3))/(4sqrt(2))," D) "(3-sqrt(3))/(4sqrt(2))]]

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Find the value of cos^(2)112(1)/(2^(@))-sin^(2)52(1)/(2^(@))

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P.T (i) sin^2 52""1^@/2-sin^2 22""1^@/2=(sqrt3+1)/(4sqrt2) sin^2 52""1^@/2-sin^2 22""1^@/2=(sqrt3+1)/(4sqrt2)

If cos^(2)52(1)/(2)-sin^(2)22(1)/(2) = (alpha-sqrt(beta))/(gamma sqrt(delta)) then value of (alpha+beta)/(gamma+delta)

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(sin ^ (2) (22 (1) / (2)) ^ (@) + cos ^ (2) (22 (1) / (2)) ^ (@)) / (sin ^ (2) (44 (1) / (2)) ^ (@) + cos ^ (2) (44 (1) / (2)) ^ (@))