question_answer

If \[Sin\,x+si{{n}^{2}}x=1\], then \[co{{s}^{6}}\,x+co{{s}^{12}}x+3\,co{{s}^{10}}x+3cos\,8\text{ }x\]is equal to

A)  \[1\]                

B)  \[{{\cos }^{3}}\times {{\sin }^{3}}\times \]

C)  \[0\]                

D)  \[\infty \]