sin90^(@)=2sin45^(@)*cos45^(@)

Evaluate : (i) sin^(2)30^(@)-2cos^(3)60^(@)+3tan^(4)45^(@) (ii) (cos0^(@)+sin45^(@)+sin30^(@))(sin90^(@)-cos45^(@)+cos60^(@))

4sin^(2)60^(@)+3tan^(2)30^(@)-8sin45^(@)*cos45^(@)

If tan^(2) 45^(@)-cos^(2) 60^(@)=x sin 45^(@) cos45^(@) tan 60^(@) , then find the value of x.

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

The value of ("sin"23^(@)"cos"67^(@)"tan"45^(@)+"cos"23^(@)"sin"67^(@)"cot"45^(@))/(2"sin"45^(@)"cos"45^(@)) is:

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

Choose the correct answer in each of the following questions: (cos0^(@)+sin30^(@) +sin45^(@))(sin 90^(@) + cos60^(@)-cos45^(@))=?

What is the value of (1/(sin45^@)-sin45^@) (1/(cos 45^@)-cos45^@)(tan45^@+1/(tan45^@)) ?

If tan x =sin 45^(@) cos 45^(@) cos 45^(@)+Sin30^(@) ,then x is equal to: