1.

For all the values of A,B,C and P,Q,R, the value of ∣∣∣∣∣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)∣∣∣∣∣ is:

Answer»

For all the values of A,B,C and P,Q,R, the value of

cos(AP)cos(AQ)cos(AR)cos(BP)cos(BQ)cos(BR)cos(CP)cos(CQ)cos(CR)

is:



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