1 + tan²2θ =
A). sec²¸
B). csc²¸
C). csc²2¸
D). sec²2¸
2. If $sec\theta - tan\theta$ = $\frac{1}{\sqrt{3}}$ , the value of $sec\theta.tan\theta$ is
4. What is the simplified value of (cosec A + sin A) (cosec A – sin A)?
5. The value of $tan 11^{0} tan 17^{0} tan 79^{0} tan 73^{0}$ is
6. If θ be positive acute angle and 5cosθ + 12sinθ = 13, then the value of cosθ is