If \[\cos 7\theta =\cos \theta -\sin 4\theta ,\] then the general value of \[\theta \] is

\[\frac{n\pi }{6},\frac{n\pi }{3}+{{(-1)}^{n}}\frac{\pi }{18}\]

\[\frac{n\pi }{3},\frac{n\pi }{3}+{{(-1)}^{n}}\frac{\pi }{18}\]

\[\frac{n\pi }{4},\frac{n\pi }{3}\pm \frac{\pi }{18}\]

\[\frac{n\pi }{4},\frac{n\pi }{3}+{{(-1)}^{n}}\frac{\pi }{18}\]

If \[\cos 7\theta =\cos \theta -\sin 4\theta ,\] then the general valu

1.	If \[\cos 7\theta =\cos \theta -\sin 4\theta ,\] then the general value of \[\theta \] is
A.	\[\frac{n\pi }{6},\frac{n\pi }{3}+{{(-1)}^{n}}\frac{\pi }{18}\]
B.	\[\frac{n\pi }{3},\frac{n\pi }{3}+{{(-1)}^{n}}\frac{\pi }{18}\]
C.	\[\frac{n\pi }{4},\frac{n\pi }{3}\pm \frac{\pi }{18}\]
D.	\[\frac{n\pi }{4},\frac{n\pi }{3}+{{(-1)}^{n}}\frac{\pi }{18}\]
Answer» E.

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If \[\cos 7\theta =\cos \theta -\sin 4\theta ,\] then the general value of \[\theta \] is

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