Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

What is (\tan^{-1}x+\cot^{-1}x), where (x>0)?

Answer and explanation

Correct answer: (\frac{\pi}{2})

The governing concept is the principal-value identity for inverse tangent and inverse cotangent. For a positive real number x, let θ = tan⁻¹x. Then θ lies in (0, π/2), and cot⁻¹x is the complementary angle π/2 − θ under the standard Class 12 principal-value convention. Therefore tan⁻¹x + cot⁻¹x = θ + (π/2 − θ) = π/2. Hence option B is correct. Option A would occur only for a particular value such as x = 1, not for every positive x. Options C and D ignore the complementary principal-value relationship. The restriction x > 0 also avoids sign-related branch complications.

Related tags

Inverse-TrigonometryIdentityPrincipal-ValueProperties Of Inverse Trigonometric FunctionsInverse Trigonometric FunctionsMathematicsClass 12 Mcq

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.