If cosa +sina= √2cosa then prove that cosa -sina=√2cosa
Answers
Answered by
3
Answer: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
Step-by-step explanation:
Similar questions