sammaria118 sammaria118
  • 08-01-2022
  • Mathematics
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what is the identity of cos 2 θ

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janatallulah60
janatallulah60 janatallulah60
  • 08-01-2022

Using the cosine double-angle identity. The cosine double angle formula tells us that cos(2θ) is always equal to cos²θ-sin²θ.

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