Because art is (c) subjective, people sometimes disagree about whether soothing is a work of art.
All of these answers are true about art, but looking at the sentence itself subjective (which means that opinions can differ), is the only one that makes sense.
10, 20 , 30, 45 has 5 as their greatest common factor
That's of course the sum angle formula for sine
sin(a+b) = sin a cos b + cos a sin b
We have a=20° b=40°
sin 20° cos 40° + cos 20° sin 40°
= sin(20°+40°)
= sin(60°)
= √3/2
Answer: √3/2
The answer is 69.5 because all you have to do is 139/2
