If 1800 < A < 270, then is sin (AI2) positive or negative?

Week 1 BASICS REWIEW Arithmetic: a+b=b+a a+b +c=a+(b+c) ab+c =ab+ac ab=ba ab)c=a(bc) Multiplying Fractions: a c ac × = b d bd Dividing Fractions: a÷ = ad b d bc Adding Fractions: a+ = ad+cb= ad+bc b d bd bd bd Exponent Basics: an means multiply a by itself n times 0 =0wheren>0 0 a =1wherea≠0 0 isindeterminate a = 1 wherea≠0 an becau0e n−n n −n 1=a =a =a a 1=a a−n 1 =a−n an Laws of Exponents: Given m & n are integers and a & b are real numbers: a a =a m+n m a m−n n =a wherea≠0 a