1.

If sin⁡α + (sin⁡α)2= 1, then the value of (cos⁡α)12+ 3 (cosα)10+ 3 (cos⁡α)8+ (cos⁡α )6– 1 is

A. 0
B. 1
C. – 1
D. 2
Answer» B. 1


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