The value of the expression 1−sin2⁡y1+cos⁡y+1+cos⁡ysin⁡y−sin⁡y1−cos⁡y is equal to

The value of the expression 1sin2y1+cosy+1+cosysinysiny1cosy is equal to

  1. A

    0

  2. B

    1

  3. C

    sin y

  4. D

    cos y

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    Solution:

    The given expression can be written as

    1+cosysin2y1+cosy+1cos2ysin2ysiny(1cosy)=cosy(1+cosy)1+cosy+0=cosy

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