If `sin^4x+cos^4y+2=4sinxcosy`  then the value of `sinx+cosy` is equal to

If `sin^4x+cos^4y+2=4sinxcosy` then the value of `sinx+cosy` is equal to

To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW If `sin^4x+cos^4y+2=4sinxcosy` then the value of `sinx+cosy` is equal to