Home
Class 12
MATHS
If in a triangle DeltaABC , a^2 cos^2 A-...

If in a triangle `DeltaABC , a^2 cos^2 A-b^2-c^2=0` then

A

`(pi)/(4)ltAlt(pi)/(2)`

B

`(pi)/(2)ltAltpi`

C

`A=(pi)/(2)`

D

`Alt(pi)/(4)`

Text Solution

Verified by Experts

The correct Answer is:
b
Promotional Banner

Topper's Solved these Questions

  • SOLUTION OF TRIANGLES

    MTG-WBJEE|Exercise WB JEE (Previous Years Questions) CATEGORY 2: Single Option Correct Type|1 Videos

  • SOLUTION OF TRIANGLES

    MTG-WBJEE|Exercise WB JEE WORKOUT (CATEGORY 3 : One or More than One Option Correct Type|10 Videos

  • SETS , RELATIONS AND FUNCTIONS

    MTG-WBJEE|Exercise WB JEE PREVIOUS YEARS QUESTIONS (SINGLE OPTION CORRECT TYPE)|44 Videos

  • STATISTICS AND PROBABILITY

    MTG-WBJEE|Exercise WB JEE Previous Years Questions ( CATEGORY 3 : One or More than One Option Correct Type ( 2 Marks) )|3 Videos

Similar Questions

Explore conceptually related problems

If in a triangle Delta ABC,a^(2)cos^(2)A-b^(2)-c^(2)=0 then

If in a DeltaABC,a^(2)cos^(2)A-b^(2)-c^(2)=0 , then

In a triangle ABC,a^(2)cos^(2)A=b^(2)+c^(2) then triangle is

If in a DeltaABC,a^(2)cos^(2)A=b^(2)+c^(2) , then

If in a triangle ABC, b cos ^(2) "" A/2 + a cos ^(2) "" B/2 = (3c)/(2), then

In a triangle ABC,cos^(2)A+cos^(2)B+cos^(2)C=

In triangle ABC,cos A+2cos B+cos C=2, then-

Show that, in a triangle ABC. a^(2) = (b - c)^(2) cos^(2) (A/2) + (b + c)^(2) sin^(2) (A/2) .