MythiliR698698 MythiliR698698
  • 27-10-2022
  • Mathematics
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cos2A+1what is it equivalent to?

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HaoranC714026 HaoranC714026
  • 27-10-2022

Simplify the expression by using identities of trigonometry.

[tex]\begin{gathered} \cos 2A+1=\cos ^2A-\sin ^2A+(\cos ^2A+\sin ^2A) \\ =2\cos ^2A \end{gathered}[/tex]

So answer is,

[tex]2\cos ^2A[/tex]

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