Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesFundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles
MediumThe value of $\text{sech}(i\pi)$ is
- A$-1$
- B$i$
- C$0$
- D$1$
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$\sin ^2 \frac{2 \pi}{3}+\cos ^2 \frac{5 \pi}{6}-\tan ^2 \frac{3 \pi}{4}=$
If $\cot x = -\frac{5}{12}$ and $x$ lies in the second quadrant,find the values of the other five trigonometric functions.
Medium
View Solution$\operatorname{Tanh}^{-1}(\sin \theta) =$
If $\theta$ lies in the first quadrant and $5 \tan \theta = 4$,then $\frac{5 \sin \theta - 3 \cos \theta}{\sin \theta + 2 \cos \theta}$ is equal to
DifficultAP EAMCET 2007
View Solution$\tan 1^\circ \tan 2^\circ \tan 3^\circ \tan 4^\circ \dots \tan 89^\circ = $
Easy
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