taking theta=30 verify cos^2 theta = 2cos^2 theta -1 = 1-2sin^2 theta
(you will get reported, if you try some nuisance)
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Step-by-step explanation:
w dcrv 2d
x2dx
1d 2fc
3f
3f
wf
v3fc
2
f
wf
3
fv
2
fv
2t
v
2f
v2fv2fv
2f
2f
2g
3
g
3g
4wh 3qgv4gv3yv3yvxyv
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