(1 + cosacosß) - (cosc + cosß) is e...
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(1 + cosacosß) - (cosc + cosß) is equal to- (A)sin'o + sin B (B) sina sin B (C) cosa + cos’ (D) cos'a cos's

JEE/Engineering Exams
Maths
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( (1+cos alpha cos beta)^{2}-(cos alpha+cos beta)^{2} ) ( 1+cos ^{2} alpha cos ^{2} beta+2 cos alpha cos beta-cos ^{2} alpha-cos ^{2} beta ) ( -2 cos alpha cos beta ) ( left[(a+b)^{2}=a^{2}+b^{2}+2 a bright] ) ( 1+cos ^{2} alpha cos ^{2} beta-cos ^{2} alpha-cos ^{2} beta ) ( 1-cos ^{2} beta+cos ^{2} alphaleft(cos ^{2} beta-1right) ) ( left(cos ^{2} beta-1right)left(cos ^{2} alpha-1right) ) ( sin ^{2} beta sin ^{2} alpha )
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