Class 11MathematicsTrigonometric FunctionsFundamental 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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If $\tan \theta = 2$ and $\theta$ lies in the third quadrant,then the value of $\sec \theta$ is
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$\frac{1-2(\cos 60^{\circ}-\cos 80^{\circ})}{2 \sin 10^{\circ}} = \dots$
The value of $\cos 255^o + \sin 195^o$ is
DifficultAIEEE 2012
View SolutionThe value of $\cos A - \sin A$ when $A = \frac{5\pi}{4}$ is
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