salinamaharjan231
salinamaharjan231 salinamaharjan231
  • 21-06-2022
  • Mathematics
contestada

sin²A-cos²A=2sin²A-1​

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konrad509
konrad509 konrad509
  • 21-06-2022

[tex]\sin^2\alpha-\cos^2\alpha=2\sin^2\alpha-1\\\sin^2\alpha+\cos^2\alpha=1[/tex]

This is the Pythagorean identity, therefore [tex]\alpha\in\mathbb{R}[/tex].

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bdilsai06192
bdilsai06192 bdilsai06192
  • 22-06-2022

Step-by-step explanation:

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