Hence solve the equation $$\( \cos \left(x-30^{\circ}\right)=2 \sin \left(x+30^{\circ}\right), \)$$ for $$\(0^{\circ}<x<360^{\circ}\)$$. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................
Exam No：9709_s21_qp_31 Year：2021 Question No：3(b)
Answer:
Obtain answer in the given interval, e.g.173.8 \({ }^{\circ}\)
Obtain a second answer and no other in the given interval, e.g. \(353.8^{\circ}\)
Obtain a second answer and no other in the given interval, e.g. \(353.8^{\circ}\)
Knowledge points:
3.3.2.1 more contents
3.3.2.2 the expansions of
3.3.2.3 the formulae for sin 2A and tan 2A
3.3.2.4 the expression of
Solution:
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