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M: +1.00/-0.25

If sin ? + s i n 2 sin^{2} ? = 1, then what is the value of ( c o s 1 2   ?   + 3   c o s 1 0   ? + 3   c o s 8   ?   + c o s 6   ? ? 1 ) (cos^{12}\ \theta\ + 3\ cos^{10}\ \theta+3\ cos^{8}\ \theta\ + cos^{6}\ \theta -1)

[SSC CPO 2 July 2017 Morning Shift With Answers]
A
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D