Exact value of `cos 20^0+2sin^2\ \ 55^0-sqrt(2)sin65^0\ ` is- a.`1` b. `1/(sqrt(2))` c.`sqrt(2)` d. zero

Q.exact value of cos20^(@)+2sin^(2)(55)^(@)-sqrt(2)sin65^(@)

The value of cos 20^(@)+2sin^(2)55^(@)-1-sqrt(2)sin65^(@) =

cos20^(@)+2sin^(2)(55)^(@)-sqrt(2)sin65^(@) is equal

cos20^(@)+2sin^(2)55^(@)-sqrt(2)sin65^(@) is equal to

Show that: sin 50^0cos95^0=(sqrt(2)sin35^0-1)/(2sqrt(2))

Show that: sin 50^0cos85^0=(1-sqrt(2)sin35^0)/(2sqrt(2))

The value of sin^2 75^0-sin^2 15^0 is a. 1//2 b. sqrt(3)//2 c. 1 d. 0

The value of (lim)_(x->0)(sqrt(2)-sqrt(1+cos x))/(sin^2x) is 1/(2sqrt(2)) b. 1/(8sqrt(2)) c. 1/(4sqrt(2))\ d. -1/(4sqrt(2))

If sintheta+cos e ctheta=2 , then the value of sintheta/(16)sintheta/8sintheta/4sintheta/2sin2theta is 1 b. 1/(sqrt(2)) c. -1/(sqrt(2)) d. 0

The value of cos 20^(@) + cos 100^(@) + cos 140^(@) is equal to a) (1)/(2) b) (1)/(sqrt(3)) c) sqrt(3) d)0