Find the value of the following:
`(cos47^(@)/sin43^(@))^(2)+(sin72^(@)/cos18^(@))^(2)-2cos^(2)45^(@)`

Find the value of the following: (sin90^(@)+cos60^(@)+cos45^(@))xx(sin30^(@)+cos0^(@)-cos45^(@))

Find the value of the following: (cos70^(@))/(sin20^(@))+(cos59^(@))/(sin31^(@))+(costheta)/(sin(90^(@)-theta))-8cos^(2)60^(@)

Evaluate the following sin 45 ^(@) +cos 45^(@)

Find the value of the following: sin^(2)30^(@)-2cos^(3)60^(@)+3tan^(4)45^(@)

Find the value of the following: (tan45^(@))/("cosec"30^(@))+(sec60^(@))/(cot45^(@))-(5sin90^(@))/(2cos0^(@))

Find the value of ((cos1^(@)+sin1^(@))(cos2^(@)+sin2^(@))(cos3^(@)+sin3^(@))...(cos 45^@sin45^@))/( cos1^(@)cos2^(@)cos3^(@)...cos45^(@))