√2+√2+√2+cosx=2cosx
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Step-by-step explanation:
- 3√2+cosx = 2cosx
- 3√2+ = 2cosx-cosx
- 3√2 = cosx
Upto this is correct
but there is no value of cos
So I think that question is wrong
You can try by this way
It is 8x
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