Math, asked by Anonymous, 1 year ago

please answer this question.... Don't give blind answers... I need with process... Correct answer will be marked as brainliest....

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Answers

Answered by chunu2
1
Please keep ur promise sir
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chunu2: This is the best method
chunu2: And the fastest
Anonymous: I am not sir,,
Anonymous: Tq...
chunu2: If it is true for one case it must be 0 for all cases
chunu2: Next time do not give the options or else people will guess
chunu2: If u liked please mark as brainliest and click thanks
Anonymous: its ok... tq for ur advise...
Anonymous: I already did it...
chunu2: Ok thanks
Answered by sanjay270899
1
Here sigma (Σ) is important,

Σ sign means all three angles A,B & C of triangle have to used and then summation...

I have proved without any assumptions.

Answer is zero.

"Thanks"
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