`sin^(2)45^(@)+cos^(2)45^(@)=`

The value of sin^(2)30^(@)cos^(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^(@)

(5sin^(2)30^(@)+cos^(2)45^(@)-4tan^(2)30^(@))/(2sin30^(@).cos30^(@)+tan45^(@))=?

Choose the correct answer in each of the following questions: If tan^(2)45^(@)-cos^(2)30^(@)=x sin45^(@) cos 45^(@) " then " x =?

cos^(2) 45^(@) - sin^(2) 15^(@)=

Evaluate : sin ^(2)60^(@)tan 45^(@)- cos^(2)45^(@)sec 60^(@)

Evaluate : sin ^(2)60^(@)tan 45^(@)- cos^(2)45^(@)sec 60^(@)

If 2 sin ^(2) x + cos ^(2) 45^(@) = tan 45^(@) and x is an acute angle, then the value of tan x is :

2sin45^(@)cos45^(@)