If tan θ + cot θ = k, then tan² θ + cot² θ is equal to:
Show answer & explanation
Correct answer: B
Explanation
(tan θ + cot θ)² = tan² θ + cot² θ + 2tan θ cot θ
tan θ cot θ = 1
k² = tan² θ + cot² θ + 2
tan² θ + cot² θ = k² − 2
SSC Selection Post - Higher Secondary Level - 28th July 2025 - Shift 2 • Quantitative Aptitude • Q40
If tan θ + cot θ = k, then tan² θ + cot² θ is equal to:
Correct answer: B
Explanation
(tan θ + cot θ)² = tan² θ + cot² θ + 2tan θ cot θ
tan θ cot θ = 1
k² = tan² θ + cot² θ + 2
tan² θ + cot² θ = k² − 2