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Sin 135
sin(180-45)            sin(180- theta)=sin thete
0 0 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
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