Calculate the value of A, if :
(1) (sin A - 1) (2 cos A - 1) = 0
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Step-by-step explanation:
sin A-1=0
sin A=1
sin A=sin 90°
A=90°
2cos A-1=0
2cos A=1
cos A=1/2
cos A=cos 60°
A=60°
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