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    The value of sin2^22​​⁡θ + cos2^22​​⁡θ -(sec2^22​​⁡θ - tan2^22​​θ) + tan ⁡θ cos⁡ θ + sin⁡ θ is _____.
    Question

    The value of sin2^2​​⁡θ + cos2^2​​⁡θ -(sec2^2​​⁡θ - tan2^2​​θ) + tan ⁡θ cos⁡ θ + sin⁡ θ is _____.

    A.

    sec2θ^2 \theta​​

    B.

    2sin θ\theta​​

    C.

    -1

    D.

    0

    Correct option is B

    Given:

    The value of sin2^2​​⁡θ + cos2^2​​⁡θ -(sec2^2​​⁡θ - tan2^2θ) + tan ⁡θ cos⁡ θ + sin⁡ θ 

    Identity Used: 

    sin2^2​​​⁡θ + cos2^2​⁡θ  = 1 

    sec2^2​​​⁡θ - tan2^2​θ  = 1 

    Solution:  

    sin2^2​​⁡θ + cos2^2​​⁡θ -(sec2^2​​⁡θ - tan2^2θ) + tan ⁡θ cos⁡ θ + sin⁡ θ   

    = 1 - 1 + sinθcosθ×cosθ+sinθ\frac{sin\theta }{cos\theta} \times cos \theta + sin \theta  

    = 2 sinθsin \theta


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