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In the given figure, BC=15 cm and sin B ...

In the given figure, BC=15 cm and sin B = `4/5` .
Now, if tan `angleADC = 1`, calculate the measures of CD and AD.

Also , show that : `tan^2B - 1/(cos^2B)=-1`

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The correct Answer is:
`CD = 20 cm and AD = 20sqrt2 cm = 28.28 cm`
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ICSE-TRIGONOMETRICAL RATIOS -EXERCISE 22(B)
  1. Using the measurements given in the following figure : Write an exp...

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  2. In the given figure, BC=15 cm and sin B = 4/5 . Calculate the measu...

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  3. In the given figure, BC=15 cm and sin B = 4/5 . Now, if tan angleAD...

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  4. If sin A + cosec A = 2, find the value of sin^2 A + "cosec"^2 A.

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  5. If tan A + cot A = 5, find the value of tan^2 A + cot^2 A.

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  6. Given : 4 sintheta = 3 cos theta , find the value of: sin theta

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  7. Given : 4 sintheta = 3 cos theta , find the value of: cos theta

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  8. Given : 4 sintheta = 3 cos theta , find the value of: cot^2 theta ...

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  9. Given : 4 sintheta = 3 cos theta , find the value of: 4 cos^2theta-...

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  10. Given : 17 cos theta = 15, find the value of tan theta + 2 sec theta.

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  11. Given 5 cos A - 12 sin A = 0 , evaluate : (sinA+cosA)/(2 cosA-sinA)

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  12. In the given figure, angleC = 90^@ and D is midpoint of AC. Find : ...

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  13. In the given figure, angleC = 90^@ and D is midpoint of AC. Find : ...

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  14. If 3 cos A = 4 sin A, find the value of : cos A

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  15. If 3 cos A = 4 sin A, find the value of : 3 - cot^2A+ "cosec"^2A

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  16. In triangle ABC, angleB = 90^@ and tan A = 0.75 If AC = 30 cm, find t...

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  17. In rhombus ABCD, diagonals AC and BD intersect each other at point O. ...

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  18. In triangle ABC, AB = AC = 15 cm and BC = 18 cm. Find : cos B

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  19. In triangle ABC, AB = AC = 15 cm and BC = 18 cm. Find : sin C

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  20. In triangle ABC, AB = AC = 15 cm and BC = 18 cm. Find : tan^2B - sec...

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