3-4sin²theta/cos²theta =3-tan²theta
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Step-by-step explanation:
Dividing by cos2thetta
3sec2thetta-4tan2thetta
Substitute sec2thetta by 1+tan2thetta
3(1+tan2thetta)-4tan2thetta
3+3tan2thetta-4tan2thetta
3-tan2thetta
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