Teaching UP TGT Mock Test Series 2025 Quantitative Aptitude Trigonometry

In Δ ABC, ∠A = 90°, AB = 20 cm and BC = 29 cm. What is the value of (sinB – cotC)?

1
\( - \frac{9}{{29}}\)
2
\( \frac{9}{{29}}\)
3
\(- \frac{189}{{580}}\)
4
\(\frac{189}{{580}}\)
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