Introduction to Trigonometry

Bihar Board Class 10 · Mathematics · 116 past questions

21 of 116 · show all

1. Q62 2022

   In right $\triangle ABC$, $\angle B=90^\circ$, $AB=12$ cm, $BC=5$ cm and $AC=13$ cm, then $\sin C$ is equal to

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2. Q63 2022

   If $\cos\theta = p$ then the value of $\tan\theta$ is

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3. Q64 2022

   $\frac{1}{\sin\theta} =$

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4. Q65 2022

   $\sec B \times \cos B =$

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5. Q66 2022

   If $\cot\theta = \frac{1}{\sqrt{3}}$ then the value of $\sec\theta$ is

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6. Q67 2022

   If $A = 45^\circ$ then $\sin A + \cos A =$

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7. Q68 2022

   If $2\sin\alpha = 2$ then $\alpha =$

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8. Q69 2022

   $\frac{\tan 21^\circ}{\cot 69^\circ} =$

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9. Q70 2022

   $\frac{\sin 30^\circ}{\cos 30^\circ} \times \cot 30^\circ =$

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10. Q71 2022

    $\frac{1-\tan^2 45^\circ}{1+\tan^2 45^\circ} =$

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11. Q72 2022

    $\tan 60^\circ : \tan 45^\circ =$

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12. Q73 2022

    If $\theta$ and $\phi$ are complementary angles then

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13. Q74 2022

    $\sin^2 75^\circ + \sin^2 15^\circ =$

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14. Q75 2022

    $1+\tan^2\theta =$

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15. Q76 2022

    $2(\sin^2\alpha + \cos^2\alpha) =$

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16. Q77 2022

    $5\operatorname{cosec}^2\theta - 5\cot^2\theta =$

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17. Q78 2022

    If $3\alpha = 180^\circ$ then $\cos\alpha =$

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18. Q79 2022

    If $a\sin\theta = 1$ and $b\cos\theta = 1$ then $\tan\theta =$

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19. Q80 2022

    Whose value is $\frac{1}{\sqrt{3}}$ ?

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20. Q81 2022

    If $\sec\theta + \tan\theta = x$ then $\tan\theta =$

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21. Q82 2022

    $\sin^2\phi + \frac{1}{1+\tan^2\phi} =$

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