Question

☆★ the correct ans is option three but I want the steps
plzz no irrelevant ans or it will be reported
only answer if you know 》》》》》》》》》》

Answer 1

Final result C ) lambda < -2√2-1

Things to know :

1) If point (x1,y1) lies inside the circle f(x,y) = 0 then f(x1,y1) <0 .

2) min value of (sin a + cos a) = -√2.



Steps:

1) Plug sin a and cos a into given equation and then use f(sin a, cos a) <0 to lie this point inside the circle.

2) Use minimum value in last step.


Hope, you understand my answer.