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Questions  

2+sin6θ+cos6θsin2θ+cos4θ=

a
1
b
2
c
3
d
4

detailed solution

Correct option is C

2+sin6θ+cos6θsin2θ+cos4θ=2+sin2θ+cos2θ3-3sin2θcos2θsin2θ+cos2θsin2θ+cos2θ1-sin2θ                                 =2+1−3sin2θcos2θ1−sin2cos2θ                                                                            =31−sin2θcos2θ1−sin2cos2θ                                   =3

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