Question

CosA-SinA=1 then prove that CosA+SinA=1​

Answer 1

Answer:

Step-by-step explanation:

on squaring both side  

sin2+cos2-2sincos =1  

-2sincos =1-1

sincos =-0

2sincos = 0

on adding 1 both sides

sin2 +cos2+2sincos =1  

(sin+cos)^2=1

sin +cos =root 1 =+-1