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Which one of the following is true for 0° < θ < 90° ?
Answer & Solution
Correct Answer:
Option
C
$$\eqalign{
& {\text{Put, }}\theta = {60^ \circ } \cr
& \Rightarrow \cos \theta > {\cos ^2}\theta \cr
& \Rightarrow \cos {60^ \circ } > {\cos ^2}{60^ \circ } \cr
& \Rightarrow \frac{1}{2} > \frac{1}{4} \cr
& \cos \theta > {\cos ^2}\theta \cr} $$
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