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Mathematics
Mathematics
Problem
Consider the trigonometric equation
sin
x
+
sin
3
x
=
3
cos
2
x
,
\sin x+\sin 3x=\sqrt{3}\,\cos 2x,
sin
x
+
sin
3
x
=
3
cos
2
x
,
where
x
x
x
is measured in degrees. (i) Rewrite each side of the equation so that all terms involve a single product of two trigonometric functions. (ii) Hence, solve the equation for
0
∘
≤
x
≤
360
∘
0^{\circ}\le x\le360^{\circ}
0
∘
≤
x
≤
36
0
∘
.
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