if cos-sin=√2sin prove that cos+sin=√2sin
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Cos - sin = √2 sin
Cos = √2sin + sin
Cos = sin (√2 + 1)
Cos (√2 - 1) = sin (√2 + 1) (√2 - 1)
√2cos - cos = sin (2 - 1)
√2cos - cos = sin
Sin = √2cos - cos
Sin + cos = √2cos.
Cos = √2sin + sin
Cos = sin (√2 + 1)
Cos (√2 - 1) = sin (√2 + 1) (√2 - 1)
√2cos - cos = sin (2 - 1)
√2cos - cos = sin
Sin = √2cos - cos
Sin + cos = √2cos.
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