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3sin²x-2cos²x=5sin²x-2​
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3sin²x-2cos²x=5sin²x-2​

User Ulas
by
8.5k points

1 Answer

6 votes

Answer:

  • L.H.S.3sin²x-2cos²x
  • 3sin²x-2(1-sin²x)
  • 3sin²x-2+2sin²x
  • 5sin²x-2
  • R.H.S
  • proved

Explanation:

Note:

we have

sin²x+cos²x=1

replacing it

cos²x=1-sin²x

[as we need sin on right hand side.]

User Baahubali
by
8.6k points
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