Q. If $\frac{\cos ^{4} \alpha}{\cos ^{2} \beta}+\frac{\sin ^{4} \alpha}{\sin ^{2} \beta}=1$, then the value of $\left[\frac{\cos ^{4} \beta}{\cos ^{2} \alpha}+\frac{\sin ^{4} \beta}{\sin ^{2} \alpha}\right]$ is (where $[\,\,.\,\,]$ denotes greatest integer function)
Trigonometric Functions
Solution: