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22-05-2021
Mathematics

contestada

3sin²x-2cos²x=5sin²x-2

Respuesta :

22-05-2021

Answer:

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

Step-by-step explanation:

Note:

we have

sin²x+cos²x=1

replacing it

cos²x=1-sin²x

[as we need sin on right hand side.]

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