sin25^(@)cos115^(@)=(1)/(2)(sin40^(@)-1)

Prove tha sin25^(0)cos115^(0)=(1)/(2)(sin40^(@)-1)

(sqrt2-sin25^(@)-cos25^(@))/(sin25^(@)-cos25^(@)) is equal to

sin25^(@)cos65^(@)+cos25^(@)sin65^(@)

sin25^(@)cos65^(@)+cos25^(@)sin65^(@)

Prove tha sin 25^0 cos 115^0 = 1/2 (sin 140^0 -1)

The value of (sin25^(@)cos65^(@)+cos25^(@)sin65^(@))/(tan^(2)27^(@)-cos ec^(2)20^(@))

The value of (cos25^(@))/(sin70^(@)sin85^(@))+(cos70^(@))/(sin 25^(@)sin85^(@))+(cos85^(@))/(sin25^(@)sin70^(@)) is

The value of (cos25^(@))/(sin70^(@)sin85^(@))+(cos70^(@))/(sin 25^(@)sin85^(@))+(cos85^(@))/(sin25^(@)sin70^(@)) is

The value of (cos25^(@))/(sin70^(@)sin85^(@))+(cos70^(@))/(sin 25^(@)sin85^(@))+(cos85^(@))/(sin25^(@)sin70^(@)) is

Prove that: (sin A + cos A)/(sin A - cos A) + (sin A - cos A)/(sin A + cos A) = (2)/(sin^(2)A-cos^(2)A)=(2)/(2sin^(2)A-1)=(2)/(1-2 cos^(2)A) .