Let's simplify the given expression step by step:
sin^2d - cos^2d + 1
Using the Pythagorean identity sin^2d + cos^2d = 1, we can replace cos^2d with 1 - sin^2d:
sin^2d - (1 - sin^2d) + 1=> sin^2d - 1 + sin^2d + 1=> 2sin^2d
Therefore, sin^2d - cos^2d + 1 = 2sin^2d as shown.
Let's simplify the given expression step by step:
sin^2d - cos^2d + 1
Using the Pythagorean identity sin^2d + cos^2d = 1, we can replace cos^2d with 1 - sin^2d:
sin^2d - (1 - sin^2d) + 1
=> sin^2d - 1 + sin^2d + 1
=> 2sin^2d
Therefore, sin^2d - cos^2d + 1 = 2sin^2d as shown.