Question

cos 12 _ sin 78 how to solve ????

Answer 1

cos 12-sin 78
=> using complementery angles
=> cos 12- sin (90-12) [ cos theta = sin 90- theta]
=> cos 12-cos 12
=> 0
I HOPE IT HELPS YOU :)

Answer 2

HEYA.......✌✌✌✌

HERE IS YOUR ANSWER........

We know that
Sin@=cos(90-@)
Sin78=cos(90-78)
Sin78=cos12

In above question we r substituting

Cos12-cos12=0

HOPE MY ANSWER WOULD HELP YOU

REGARD MADHU@