Question
What is the value of sin(B – C) cos(A – D) + sin(A
– B) cos(C – D) + sin(C – A) cos(B – D)?Solution
As no condition has been given,
So, let A = B = C = D = 0°
then sin(B – C) cos(A – D)+ sin (A – B) cos (C – D ) + sin (C – A) cos(B – D)
= sin0º cos0º + sin0º cos0º + sin0º cos0º
= 0 + 0 + 0 = 0
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