If in a - ABC- 3a - b - c- then the value of B-2 - C-2 is -

The correct option is D 2 Consider, #160; B / 2 #160; C / 2 #160; =√( s( s b ) #160;/( s a ) ( s c ) #160; #160;)×√( s( s c ) # ...

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Unit Vectors

If in a △ A...

Question

If in a $△ A B C$ , $3 a = b + c$ , then the value of $cot \frac{B}{2} . cot \frac{C}{2}$ is :

1

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\sqrt{3}

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2

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none of these

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In a triangle ABC, if b + c = 3a , then the value of is:

△ A B C

b + c = 3 a

cot \frac{B}{2} . cot \frac{C}{2}

△ A B C, 3 a = b + c

cot \frac{B}{2} cot \frac{C}{2}

In a triangle $A B C$ , if $b + c = 3 a$ , then the value of $cot \frac{B}{2} cot \frac{C}{2}$ is:

△ A B C, 3 a = b + c

cos \frac{B}{2} cot \frac{C}{2}

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