" 2."sin((45)/(2))^(@)" equal है- "

2sin45^(@)cos45^(@)

2sin45cos45

sin^(2)5^(@) + sin^(2)25^(@) + sin^(2)45^(@) + sin^(2) 65^(@) + sin^(2) 85^(@) is equal to:

The value of sin^(2)30^(@).cos^(2)45^(@)+2tan^(2)30^(@)-sec^(2)60^(@) is equal to :

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

(1-tan^2 45^@)/(1+tan^2 45^@) is equal to

(sin30^(@)cos45^(@))/(tan 60^(@)) is equal to

Prove that sin (45^(@) + theta) - sin (45^(@) - theta) = sqrt(2) sin theta

(1-tan^(2)(45^(@)-A))/(1+tan^(2)(45^(@)-A)) is equal to

sin^2 17. 5^(@)+sin^2 72. 5^(@) is equal to............ A) cos ^(2) 90^(@) B) tan ^(2) 45^(@) C) cos ^(2) 30^(@) D) sin ^(2) 45^(@)