Teaching UP TGT Mock Test Series 2025 Mathematics Trigonometry Trigonometric Identities

If  \(\cosθ =\frac{2}{3}\), then the value of [1 + tan2 θ]

1
\(\frac{2}{9}\)
2
\(\frac{4}{9}\)
3
\(\frac{9}{4}\)
4
None of these
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