If cosA+sinA=✓2cosA then show that cosA-sinA=✓2sinA.
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Answer:
Step-by-step explanation:
Let cos A -sinA = x
Squaring both equations and add it
Cos^2A+sin^2A+2sinAcosA +cos^2A+sin^2A -2sinAcosA= 2cos^2A +x^2
2-2cos^2A=x^2
x= root 2 .sinA
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