Introduction to Trigonometry

Bihar Board Class 10 · Mathematics · 116 past questions

20 of 116 · show all

1. Q13 2025

   $\tan 10^\circ \cdot \tan 23^\circ \cdot \tan 80^\circ \cdot \tan 67^\circ =$

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2. Q14 2025

   $7\sec^2 A - 7\tan^2 A =$

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3. Q15 2025

   If $x = a\cos\theta$ and $y = b\sin\theta$ then $b^2x^2 + a^2y^2 =$

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4. Q16 2025

   If $\cos\theta + \cos^2\theta = 1$ then the value of $\sin^2\theta + \sin^4\theta$ is

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5. Q17 2025

   $\frac{1+\tan^2 A}{1+\cot^2 A} =$

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6. Q18 2025

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

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7. Q19 2025

   If $\theta = 45^\circ$ then the value of $\sin\theta + \cos\theta$ is

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8. Q20 2025

   If $A = 30^\circ$ then the value of $\frac{2\tan A}{1-\tan^2 A}$ is

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9. Q21 2025

   If $\tan\theta = \frac{12}{5}$ then the value of $\sin\theta$ is

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10. Q22 2025

    $\frac{\cos 59^\circ}{\sin 31^\circ} \times \frac{\tan 80^\circ}{\cot 10^\circ} =$

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11. Q23 2025

    If $\tan 25^\circ \times \tan 65^\circ = \sin A$ then the value of $A$ is

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12. Q24 2025

    If $\cos\theta = x$ then $\tan\theta =$

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13. Q25 2025

    $(1-\cos^4\theta) =$

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14. Q26 2025

    $1+\cot^2\theta =$

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15. Q27 2025

    Which of the following values is equal to 1 ?

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16. Q28 2025

    $\cos^2 A(1+\tan^2 A) =$

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17. Q29 2025

    $\tan 30^\circ =$

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18. Q30 2025

    $\cos 60^\circ =$

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19. Q31 2025

    $\sin^2 90^\circ - \tan^2 45^\circ =$

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20. Q32 2025

    $(\sin 30° + \cos 30°) - (\sin 60° + \cos 60°) =$

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