1.  1

2.  e/2

3.  –e/2

4.  2/e

4

–e/2

Explanation :
No Explanation available for this question

# In ΔABC, R2 (sin 2A+sin 2B+sin 2C)=

1.  Δ

2.  3Δ

3.  2Δ

4.  4Δ

4

Explanation :
No Explanation available for this question

# In ΔABC,4(r1r2+ r2r3 +r3r1) =

1.  a+b+c

2.  (a+b+c)2

3.  abc

4.  0

4

(a+b+c)2

Explanation :
No Explanation available for this question

1.  0

2.  1

3.  e

4.  1/e

4

1/e

Explanation :
No Explanation available for this question

# In ΔABC, (r1-r) (r2-r) (r3-r) =

1.  4Rs2

2.  4Rr2

3.  R

4.  0

4

4Rr2

Explanation :
No Explanation available for this question

# In ΔABC, (r1 +r2) (r2 +r3) (r3+r1) =

1.  4Rs2

2.  4Rr2

3.  R

4.  0

4

4Rs2

Explanation :
No Explanation available for this question

1.  e4

2.  -e

3.  e

4.  e2

4

e4

Explanation :
No Explanation available for this question

# In ΔABC, if A, B, C are in A.P., then =

1.  cos

2.  sin

3.  2cos

4.  2 sin

4

2cos

Explanation :
No Explanation available for this question

# In ΔABC, if a,b,c are in A.P. the greatest angle is A and least is C then 4(1- cos A) (1-cos C) =

1.  cos A + cos C

2.  cos A – cos C

3.  sin A + sin C

4.  cos A – sin C

4

cos A + cos C

Explanation :
No Explanation available for this question

1.  e

2.  e2

3.  e3

4.  e4

4