`sin 45^(@)(cos 45^(@))`=…………..

2sin45^(@)cos45^(@)

Find the value of (sin45^(@) + cos 45^(@))

cos 45^(@)-sin 45^(@)=?

2sin45^@*cos45^@ = …………….

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

Find the value of (i) sin (-45^(@)) (ii) cos (-45^(@)) (iii) cot (-45^(@))

What is the value of |{:(cos 15^(@),sin 15^(@)),(cos 45^(@),sin 45^(@)):}|xx|{:(cos 45^(@),cos 15^(@)),(sin 45^(@),sin 15^(@)):}| ?

If a sin45^(@).cos45^(@).tan60^(@)=tan^(2)45^(@)-cos60^(@) , then find the value of a .

cos (A +B) + sin (A -B) = 2 sin (45 ^(@) + A) cos ( 45 ^(@) + B).