It is given that $$\(3 \sin 2 \theta=\cos \theta\)$$ where $$\(\theta\)$$ is an angle such that $$\(0^{\circ}<\theta<90^{\circ}\)$$. Find the exact value of $$\(\sec \theta\)$$. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................
Exam No：9709_w20_qp_23 Year：2020 Question No：6(b)
Answer:
Use correct identity or identities to find value of \(\sec \theta\)
Obtain \(\frac{6}{\sqrt{35}}\) or exact equivalent
Obtain \(\frac{6}{\sqrt{35}}\) or exact equivalent
Knowledge points:
2.3.2.1 more contents
2.3.2.2 the expansions of
2.3.2.3 the formulae for sin 2A,cos 2A and tan 2A
2.3.2.4 the expression of
Solution:
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