`cos(30^circ)` is equal to

If |veca|=|vecb|=|vecc|=2 and veca.vecb=vecb.vecc=vecc xx veca=2 , then [veca vecb vecc] cos 45^(circ) is equal to

sin 60^(@)cos30^(@) is equal to:

The value of 16 sin 144^(circ) sin 108^(circ) sin 72^(circ) sin 36^(circ) is equal to

The value of tan 75^(circ)-cot 75^(circ) is equal to

The value of sin 50^(circ)-sin 70^(circ)+sin 10^(circ) is equal to

The value of sqrt3 cosec 20^circ - sec 20^circ is equal to

tan 40^circ + 2tan 10^circ is equal to