1.

If θ is positive acute angle and 3(sec2θ + tan2θ) = 5, then the value of cos2θ is?

A. $\frac{1}{2}$$
B. $\frac{{\sqrt 3 }}{2}$$
C. $\frac{1}{{\sqrt 2 }}$$
Answer» B. $\frac{{\sqrt 3 }}{2}$$


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