Answers

2015-04-16T17:10:32+05:30
Sin 135
sin(180-45)            sin(180- theta)=sin thete
sin45=1
sin135=1≠-1
0
sin(180-thete)=sin thete is before second right
yes it is in the second quadrant
180 - theta means theta comes in 2nd quardent or in 2nd quardent sin is +ve,180-theta means trigonmert function never change
thats what i said duh
hope this will helpful to solve more trig question