Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

సూక్ష్మీకరించండి \(\frac{\cos ^4 θ-\sin ^4 θ}{\sin ^2 θ}\)

1

1 - tan2 θ

2

tan2 θ - 1

3

cot2 θ - 1

4

1 - cot2 θ

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