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If tanA=(3)/(4), then show that sin A co...

If `tanA=(3)/(4)`, then show that sin A cos A`=(12)/(25)

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EDUCART PUBLICATION-INTRODUCTION TO TRIGNOMETRY AND ITS APPLICATIONS -SHORT ANSWER (SA-II) TYPE QUESTIONS
  1. Prove : 2(sin^(6)theta+cos^(6)theta)-3(sin^(4)theta+cos^(4)theta)+1=0.

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  2. If sin theta+cos theta=sqrt3, then prove that tan theta+cot theta=1

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  3. Prove that : (sin^(4)theta- cos^(4) theta+ 1) "cosec"^(2)theta=2

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  4. Prove that : (2 cos^(2) theta-cos theta)/(sin theta-2 sin^(3)theta)=...

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  5. If tanA=(3)/(4), then show that sin A cos A=(12)/(25)

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  6. Prove that: (tantheta/(1-tantheta))-(cottheta/(1-cottheta))=(costheta+...

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  7. If costheta+sintheta=sqrt(2)costheta, show that costheta-sintheta=sqrt...

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  8. Prove that: (tanA + tanB)/(cotA+cotB)=tanAtanB

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  9. A ladder 15 metres long just reaches the top of a vertical wall. If th...

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  10. Prove that: sqrt((sectheta -1)/(sec theta +1)) + sqrt((sec theta +1)/(...

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  11. Prove that (sin theta + "cosec" theta)^(2)+(cos theta + sec theta)^(...

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  12. Prove that: (1 + cot A - "cosec"A)(1 + tanA + secA) =2

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  13. If 4 tan theta = 3, evaluate (4 sin theta - cos theta +1)/(4 sin theta...

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  14. A player sitting on the top of a tower of height 20 m observes the ang...

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  15. Using the formula cos 2theta = 2 cos^(2)theta - 1, find the value of c...

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  16. If sintheta + costheta = sqrt(3), then prove that tantheta + cot theta...

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  17. Prove that : (cosA)/(1+sin A) +(1+sinA)/(cosA)=2 sec A

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  18. Prove that : sec^(2)theta+"cosec"^(2)theta=sec^(2)theta*"cosec" ^(2)t...

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  19. If 2sin^(2)theta-cos^(2)theta=2, then find the value of theta.

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  20. The shadow of a tower standing on a level plane is found to be 50 m l...

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