If alpha + beta + gamma, pi, then the v...

If `alpha + beta + gamma, pi, ` then the value of `sin ^(2) alpha + sin ^(2) beta - sin^(2) gamma `is equal to

`2 sin alpha sin beta sin gamma`

`2 sin alpha sin beta cos gamma`

`2 cos alpha cos beta sin gamma`

`2 cos alpha cos beta cos gamma`

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ML KHANNA-TRIGONOMETRY RATIOS AND IDENTITIES-PROBLEM SET (6) ( MULTIPLE CHOICE QUESTIONS)

if A+B+C = pi then sin^(2)""(A)/(2)+sin^(2)""(B)/(2) + sin^(2)""(C )/...
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If alpha+beta+gamma=2pi, prove that : cos^2 alpha + cos^2 beta + cos^2...
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In any triangle ABC, if ( sin A + sin B + sin C ) ( sin A + sin B - si...
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If A,B,C are the angles of a triangle, then sin^(2) A + sin^(2) B + si...
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cos^(2) A + cos^(2) B + cos^(2) C =
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sin^(2) A + sin ^(2) B +sin^(2) C =
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If A+B+C=pi , prove that : sin^2, A/2 + sin^2, B/2 -sin^2, C/2 =1-2 co...
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If A+B+C=pi and A, B, C are acute positive angles and cotA cotB cotC =...
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