if (A + B+ C+D) =pi, then ∑ cosA cosB - ∑sinA sinB =

Question

if (A + B+ C+D) =pi, then ∑ cosA cosB - ∑sinA sinB =

Saurabh Koranglekar · Answer

Dear student Let A = B= C= D = pi/4 Value of required expression = 4 ( 0.5 ) - 4 ( 0.5 ) = 0 Regards

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if (A + B+ C+D) =pi, then ∑ cosA cosB - ∑sinA sinB =

if (A + B+ C+D) =pi, then ∑ cosA cosB - ∑sinA sinB =

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if (A + B+ C+D) =pi, then ∑ cosA cosB - ∑sinA sinB =

if (A + B+ C+D) =pi, then ∑ cosA cosB - ∑sinA sinB =

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