The value of cos15°cos71°2sin71°2 is
12
18
14
116
Explanation for correct option
Given trigonometric function is cos15°cos71°2sin71°2
∴cos15°cos71°2sin71°2=12cos15°·2·cos15°2sin15°2=12cos15°·sin15°∵2sinAcosA=sin2A=142cos15°·sin15°=14sin30°∵2sinAcosA=sin2A=14·12∵sin30°=12=18
Hence, the correct option is OptionB