Class 11MathematicsTrigonometric FunctionsFundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles
MediumThe value of $\frac{1+\tanh x}{1-\tanh x}$ is
- A$e^x$
- B$e^{-2x}$
- C$e^{2x}$
- D$e^{-x}$
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$\cot (45^\circ + \theta ) \cot (45^\circ - \theta ) = $
Easy
View SolutionIf $A$ and $B$ are supplementary angles,then $\sin^{2} \frac{A}{2} + \sin^{2} \frac{B}{2} =$
$\frac{1}{1+\sin \theta}+\frac{1}{1-\sin \theta} = $
The value of $\tan 1^{\circ} \tan 2^{\circ} \tan 3^{\circ} \ldots \tan 89^{\circ}$ is
MediumKCET 2021
View SolutionIn a right-angled triangle $ABC$ where $\angle C = 90^{\circ}$,$AC = BC$. If $D$ is the midpoint of $AC$,then the cotangent of $\angle DBC$ is equal to:
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