Question

Sin^4A.cos^4A/sinA-cosA=sinA+CosA

Answer 1

Answer:

1=1

Step-by-step explanation:

$sin^4 a  - cos^4a/sin a- cos a=sina+ cosa\\sin^4a -cos^4a=(sin a+ cos a)(sin a-cos a)\\sin^4a- cos^4a=sin^2a- cos^2a\\(sin^2a+ cos^2a)(sin^2a- cos^2a)=sin^2a- cos^2a\\sin^2a+cos^2a=1\\1=1$