Home
Class 12
MATHS
The angles A, B and C of a triangle ABC ...

The angles A, B and C of a triangle ABC are in arithmetic progression. If `2b^(2)+3c^(2)` then the angle A is :

A

`15^(@)`

B

`60^(@)`

C

`75^(@)`

D

`90^(@)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • SOLUTION OF TRIANGLES

    VK JAISWAL|Exercise Exercise-2 : One or More than One Answer is/are Correct|15 Videos

  • SOLUTION OF TRIANGLES

    VK JAISWAL|Exercise Exercise-3 : Comprehension Type Problems|16 Videos

  • SEQUENCE AND SERIES

    VK JAISWAL|Exercise EXERCISE (SUBJECTIVE TYPE PROBLEMS)|21 Videos

  • STRAIGHT LINES

    VK JAISWAL|Exercise Exercise-5 : Subjective Type Problems|10 Videos

Similar Questions

Explore conceptually related problems

The angles A, B and C of a triangle ABC are in arithmetic progression. AB=6 and BC=7. Then AC is :

If the angles A, B and C of a triangle are in an arithmetic progression and if a, b and c denote the lengths of the sides opposite to A, B and C respectively, then the value of the expression (a)/(c) sin 2C + (c)/(a) sin 2A is

Three angles A,B,C( taken in that order ) of triangle ABC are in arithmetic progression.If a^(2)+b^(2)-c^(2)=0 and c=2sqrt(3), then the radius of circle inscribed in triangle ABC is equal tolNote: All symbols used have usual meaning in triangle ABC.

If three sides a,b,c of a triangle ABC are in arithmetic progression, then the value of cot, A/2, cot, C/2 is (A) 1 (B) 2 (C) 3 (D) None of these

If the angles A,B, and C of a triangle ABC are in AP and the sides a,b and c opposite to these angles are in GP,then a^(2),b^(2) and c^(2) a are related as

If the lengths of the sides of a right- angled triangle ABC, right angled at C, are in arithmetic progression, then the value of 5(sinA+sinB) is

If the angles of a triangle ABC are in AP, a =2, c = 4then b is

If the angles A,B,C (in that order) of triangle ABC are in arithmetic progression,and L=lim_(A rarr C)(sqrt(3-4sin A sin C))/(|A-C|) then find the value of 100L^(2)

Angles A,B and C of a triangle ABC are in AP.If (b)/(c)=sqrt((3)/(2)) then angle A is