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The angle of elevation of to be top poin...

The angle of elevation of to be top point `P` of the vertical tower PQ of height `h` from poin A is `45^0` and from a point B, the angle of elevation is `60^0,` where B is point at a distance `d` from the point A measured along the line `A B` which makes an angle `30^0` with AQ. Prove that `d=(sqrt(3)-1)hdot`

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RD SHARMA ENGLISH-SINE AND COSINE FORMULAE AND THEIR APPLICATIONS-All Questions
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  2. A person, standing on the bank of a river, observes that the angle sub...

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  3. The angle of elevation of to be top point P of the vertical tower PQ o...

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  4. The elevation of a tower at a station A due North of it is alpha and ...

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  5. If in a Delta A B C ,\ /A=45^0,\ /B=60^0,\ a n d\ /C=75^0 , find the ...

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  6. If in any Delta A B C ,\ /C=105^0,/B=45^0, a=2, then find bdot

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  7. In Delta A B C ,\ if\ a=18 ,\ b=24\ a n d\ c=30\ a n d\ /C=90^0 find ...

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  8. In any triangle A B C , prove that following : (a-b)/(a+b)=(tan((A-B)/...

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  9. In any triangle A B C , prove that following : (a-b)cosC/2\ = csin((A-...

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  10. In any triangle A B C , prove that following : c/(a-b)=(tan(A/2)+tan(B...

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  11. In any triangle A B C , prove that following : c/(a+b)=(1-tan(A/2)tan(...

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  12. In any triangle A B C , prove that following :(a+b)/c=(cos((A-B)/2))/(...

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  13. In any triangle A B C , prove that following: sin((B-C)/2)=(b-c)/a cos...

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  14. In any triangle A B C , prove that following: (a^2-c^2)/(b^2)=("sin"(A...

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  15. In any triangle A B C , prove that following: \ bsinB-csinC=asin(B-C)

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  16. In any triangle A B C , prove that following: \ \ a^2sin(B-C)=(b^2-c^2...

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  17. In any triangle A B C , prove that following: \ a(sin B-sin C)+b( sin ...

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  18. In any triangle A B C , prove that following: \ (a^2"sin"(B-C))/(sin A...

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  19. In any triangle A B C , prove that following: \ \ bcosB+c\ cos\ C="a c...

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  20. In any triangle A B C , prove that following: \ (cos^2B-cos^2C)/(b+c)+...

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