Question
6. Express cos 0-2 sin 0 in the form of Rcos (0+a), where R>0 and ơ <a<90.Hence, solve
the equation cos0-2 sin0= 2 for O <0<360°.
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6. Express cos 0-2 sin 0 in the form of Rcos (0+a), where R>0 and ơ <a<90.Hence, solve the equation cos0-2 sin0= 2 for O <0<360°.

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