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cos (B+C-A)-cos(C+A-B)+cos(A+B-C)- cos (...

`cos (B+C-A)-cos(C+A-B)+cos(A+B-C)- cos (A+B+C)=`

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Knowledge Check

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    C
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    D
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  • If A,B,C,D are four angles then sin (A-B) cos (A+B) + sin B (B-C) .cos (B+C) + sin (C-D) cos (C+D)+ sin (D-A) cos (D+A)=

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    0
    B
    1
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    `4 sin A.sinB sin C sin D`
    D
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    If A+B+C=180^@ then sin^(3) A cos (B-C) + sin^(3)B cos(C-A)+ sin^(3) C cos (A-B)=

    For all values of A, B, C and P, Q, R |(cos(A-P), cos(A-Q),cos(A-R)),(cos(B-P), cos(B-Q), cos(B-R)),(cos(C-P), cos(C-Q), cos(C-R))|=

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