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

1.

2.

3.

4.

4

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

4

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.

4

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

4

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)

4

(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

4

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

4

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

4

-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

4

14

Explanation :
No Explanation available for this question

1.  (OP+OQ+OR)

2.  OP+OQ+OR

3.  4 (OP+OQ+OR)

4.  none

4