Question

sin(90-30)-cos(180-30)

Answer 1

cos 30 + cos 30

= 2 cos 30

$= 2( \frac{ \sqrt{3} }{2} ) \\ = \sqrt{3}$

Answer 2

sin (90-30)= sin 60=(√3)/2 and cos (180-30)= cos 150= - sin 30 =-1/2
so √(3)/2-1/2 =( 1.71-1))2 =0.71/2=0.355
hope u get itt.