Evaluate 
Given, 
Equating ‘sin x’ coeff: -
1=2A-B
B=2A-1
Equating ’cos x’ coeff:-
2=A+2B
2=A+2(2A-1)
2=A+4A-2
4=5A
Now, 
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Couldn't generate an explanation.
Generated by AI. May contain inaccuracies — always verify with your textbook.
