is the half angle identity.
= 
![\sqrt{\frac{\sqrt{3}+2 }{4} } = [tex]\frac{1}{2} \sqrt{2+\sqrt{3} }](/tpl/images/0449/9593/8a57f.png)
Use a half-angle identity to find the exact value of cos15 .
a.
(sqrt2+sqrt3)/2
c....
Mathematics, 10.01.2020 20:31 deidaralove90
Use a half-angle identity to find the exact value of cos15 .
a.
(sqrt2+sqrt3)/2
c.
(sqrt2-sqrt3)/2
b.
sqrt2+sqrt3
d.
sqrt2-sqrt3
Answers: 3
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