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Mathematics
Azaria
26 December, 22:20
Sin30=cos (2x) then x=
+4
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1
)
Eliezer Watts
27 December, 01:20
0
x = 30.
Step-by-step explanation:
Use the identity sin A = cos (90 - A).
So sin 30 = cos (90 - 30) = cos 60.
cos 2x = cos 60
so x = 30.
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