1.+206^(2)25-cos^(2)6^(2)

cos^(2)25^(@)+cos^(2)35^(@)-cos25^(@) cos35^(@)=

The value of (sin25^(@)cos65^(@)+cos25^(@)sin65^(@))/(tan^(2)70^(@)-cosec^(2)20^(@))

The value of (sin25^(@)cos65^(@)+cos25^(@)sin65^(@))/(tan^(2)27^(@)-cos ec^(2)20^(@))

Evaluate: cos^(2)25^(@)-sin^(2)65^(@)-tan^(2)45^(@)

Evaluate : (i) cos^(2) 25^(@) - sin^(2)65^(@) - tan^(2)45^(@) (ii) ((sin 77)/(cos 13))^(2) + ((cos 77)/(sin 13))^(2) - 2 cos^(2) 45^(@)

The value of the determinant |("sin"^(2)36^(@),"cos"^(2)36^(@),"cot"135^(@)),("sin"^(2)53^(@),"cot"135^(@),"cos"^(2)53^(@)),("cot"135^(@),"cos"^(2)25^(@),"cos"^(2)65^(@))| is

Find the value of [(sin^2 2 2^(@)+sin^2 6 8^(@))/(cos^2 2 2^(@)+cos^2 6 8^(@))+sin^2 6 3^(@)+cos6 3^(@)sin2 7^(@)]

The value of [ ( sin^(2) 25^(@) + sin^(2) 65^(@))/(cos^(2) 24^(@) + cos^2 66^(@)) + sin^(2)61^(@) + cos 61^@ sin 29^(@)] is :