Question

if cosx + sonx = √2cosx then you have to proove that cosx - sinx = √2sinx ???

Answer 1

Hey mate ,

As we know that,

➡(cosx + sinx) ² +(cosx - sinx)² = 2

➡(√2cosx)² +( cos -sinx)²=2

[•°• cosx +sinx=√2cosx]

➡(cosx - sinx)² = 2-2cos²x

➡(cosx - sinx)² = 2sin²x

➡cosx-sinx = √2sinx

✌✌✌✌ hope you like it✌✌✌✌

Answer 2

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Answer is in attachment

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