Question 30A rectangular piece of paper $6$ inches wide is folded as in the diagram so that one corner touches the opposite side. The length in inches of the crease $L$ in terms of angle $\theta$ is: $3\sec^2\theta\csc\theta$$6\sin\theta\sec\theta$$3\sec\theta\csc\theta$$6\sec\theta\csc^2\theta$None of these
