Using a compound or double angle formula, determine the exact vale of trig ratio, sin -pi/8
E e12 New member Joined Nov 20, 2018 Messages 2 Nov 20, 2018 #1 Using a compound or double angle formula, determine the exact vale of trig ratio, sin -pi/8
mmm4444bot Super Moderator Joined Oct 6, 2005 Messages 10,902 Nov 21, 2018 #2 Please show your efforts, so that tutors can see where you're at. Thank you. Do you know the double-angle identity for sine?
Please show your efforts, so that tutors can see where you're at. Thank you. Do you know the double-angle identity for sine?