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Grade: 11

                        

​​ 2sin π/8= √(2 + √2)

5 years ago

Answers : (1)

ng29
1698 Points
							
there are several values of trigonometry that are need to be learnt  like 150, 750, 180,360.22.50
if u dont know than u can refer some book which contains all of it
i am writing some of them for u
 
tan15= 2-3(1/2) 
tan 22.50 = 2(1/2) -1
cos 360 = (1+5(1/2)) /4
approve if useful
5 years ago
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