If k is a root of x² - 4x + 1 = 0, then what is tan⁻¹k + tan⁻¹(1/k) equal to?

1. A.-π/2
2. B.0
3. C.π/4
4. D.π/2✓ Correct

More Inverse Trigonometry questions

• → If cos⁻¹x = sin⁻¹x, then which one of the following is correct?
• → If tan⁻¹k + tan⁻¹(1/2) = π/4, then what is the value of k?
• → What is tan⁻¹(a/b) – tan⁻¹((a–b)/(a+b)) equal to?