Browse Questions

# Which of the following is not correct ?

$\begin{array}{1 1}(A)\;\sin \theta=-\large\frac{1}{5}&(B)\;\cos \theta=1\\(C)\;\sec\theta=\large\frac{1}{2}&(D)\;\tan \theta=20\end{array}$

$\sec\theta=\large\frac{1}{2}$ is not exist
Hence (C) is the correct answer.