Introduction to Trigonometry

Bihar Board Class 10 · Mathematics · 116 past questions

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1. Q83 2020

   $\tan 10^\circ \tan 15^\circ \tan 75^\circ \tan 80^\circ = ?$

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2. Q84 2020

   The length of the shadow of a 12 m high pillar falling on land is $4\sqrt{3}$ m. The angle of elevation of…

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3. Q85 2020

   $\Delta ABC$ is a right angled triangle in which $\angle C = 90^\circ$. The value of $\cos(A+B)$ is

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4. Q86 2020

   $(1 + \tan\theta + \sec\theta)(1 + \cot\theta - \operatorname{cosec}\theta) = ?$

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5. Q87 2020

   $\sin(90^\circ - \theta) =$

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6. Q88 2020

   If $\sec\theta = \frac{13}{12}$, then $\cot\theta$ is equal to

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7. Q89 2020

   $\frac{\sin 63^\circ}{\cos 27^\circ} =$

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8. Q90 2020

   If $\tan\theta = \frac{8}{15}$, then the value of $\text{cosec}\,\theta$ is

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9. Q91 2020

   Value of $2\cos^2 60°$ is

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10. Q92 2020

    $1 + \tan^2\theta =$

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11. Q93 2020

    Which of the following is equal to cosec$\theta$ ?

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12. Q94 2020

    If $2\sin\theta = 1$, then the value of $(3\cot^2\theta + 3)$ will be

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