If S is the circumcentre, G the centroid,  O the ortho-centre of ΔABC, then 

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

The minimum of cos2(1200+x)+ cos2(1200-x)is

1.  1/3

2.  1/2

3.  3/2

4.  2/3

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4
Correct Answer :

1/2


Explanation :
No Explanation available for this question

If S is the circumcentre, O is the ortho-centre of ΔABC then 

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

The maximum value of cos2(π/4-x)+(sin x- cos x)2 is

1.  1

2.  3

3.  2

4.  0

View Answer  
4
Correct Answer :

2


Explanation :
No Explanation available for this question

If A=(3, 2, 5), B=(3, 4, 5) and C=(3, 4, 7) are the vertices of a triangle  ABC, then its circumcentre is

1.  (3, 3, 5)

2.  (3, 4, 7)

3.  (3, 4, 6)

4.  (3, 3, 6)

View Answer  
4
Correct Answer :

(3, 3, 6)


Explanation :
No Explanation available for this question

The maximum value of cos2(π/4+x)(sin x -cos x)2 is

1.  -1

2.  0

3.  1

4.  2

View Answer  
4
Correct Answer :

0


Explanation :
No Explanation available for this question

If 2i+3j+5k, 2i+4j+5k and 2i+4j+7k are the vertices of ΔABC, then its circumcentre is

1.  2i+11/3j+17/3k

2.  2i+7/2 j+6k

3.  6i+11j+17k

4.  2i+4j+5/2 k

View Answer  
4
Correct Answer :

2i+7/2 j+6k


Explanation :
No Explanation available for this question

The minimum value of 5 cos θ+ 3 cos (θ+π/3)+3 is

1.  2

2.  3

3.  4

4.  -4

View Answer  
4
Correct Answer :

-4


Explanation :
No Explanation available for this question

The maximum value of 5 cos x+ 3 cos (x- 600)+7 is

1.  11

2.  13

3.  14

4.  17

View Answer  
4
Correct Answer :

14


Explanation :
No Explanation available for this question

P, Q, R are the midpoints of the sides AB, BC and CA of the triangle ABC and O is the point with the triangle , tehn  OA+OB+OC=

1.  (OP+OQ+OR)

2.  OP+OQ+OR

3.  4 (OP+OQ+OR)

4.  none

View Answer  
4
Correct Answer :

OP+OQ+OR


Explanation :
No Explanation available for this question
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