Correct option is C
Given:
2tanθ1−2sinθcosθ+1+2sinθcosθ
Formula Used:
sin2θ+cos2θ=1 (a+b)2=a2+b2+2ab (a−b)2=a2+b2−2ab tanθ=cosθsinθ
Solution:
2tanθ1−2sinθcosθ+1+2sinθcosθ =2tanθsin2θ+cos2θ−2sinθcosθ+sin2θ+cos2θ+2sinθcosθ =2tanθ(sinθ−cosθ)2+(sinθ+cosθ)2 =2tanθsinθ−cosθ+sinθ+cosθ =2tanθ2sinθ =cosθ