Question

find value of A if (cos^2A-3cosA+2) / sin^2A) = 1​

Answer 1

Step-by-step explanation:

Cos2a-3cosA+2/sin2a= 1

[(Sin2a*cos2a)-(3cosA*sin2A)+2]/sin2A=1

(1+2+3cosA*sin2A)/sin2A=1

(3+3cosA-sin2A)/sin2A=1

sin2A/sin2A=1

1=1

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