If cosA - sinA= √2sinA ,then prove that cosA + sinA = √2 cosA
Answers
Answered by
9
Answer:cosA=√2sinA+sinA
CosA=sinA(√2+1)
CosA/√2+1=sinA
CosA/√2+1×√2-1/√2-1=sinA
√2cosA-cosA/2-1=sinA
√2cosA-cosA=sinA
√cosA=sinA+cosA
Similar questions