`|["cos"70^(@), "sin"20^(@)], ["sin"70^(@), "cos"20^(@)]|=?`

cos 70^(@) + sin 40^(@)=

cos70^(@)+sin40^(@)=

cos70^(@)+sin40^(@)=

sin 70^@ - cos 40^(@) =

Find the distance between (a " sin "70^(@),-a" sin "20^(@)) and (-a" sin "70^(@),a" sin "20^(@)) .

Evalute (g) sec70^(@)sin20^(@)-cos70^(@)cosec20^(@)

sec70^(@)sin20^(@)+cos20^(@)"cosec"70^(@)=?

The value of (sin 20^(@)cos70^(@)+ cos20^(@)sin70^(@))/(sin23^(@)"cosec"23^(@)+cos23^(@)sec23^(@)) is _________.

sec70^(@)sin20^(@)+cos20^(@)cosec70^(@)=2

sin 10^(@)+sin 20^(@) + sin 40 ^(@) + sin 50 = A) sin 15^(@) +sin 75^(@) B) cos 15^(@) + cos75^(@) C) sin 70^(@) + sin 80^(@) D) cos 70^(@) + cos 80^(@)