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

The negative coterminal angle of an angle between \(-2\pi\) and (0) is \(-\frac{7\pi}{18}\). What is its principal positive angle?

Answer and explanation

Correct answer: \(\frac{29\pi}{18}\)

Coterminal angles differ by an integral multiple of \(2\pi\). Add \(2\pi\) to the given negative angle: \(-\frac{7\pi}{18}+2\pi=-\frac{7\pi}{18}+\frac{36\pi}{18}=\frac{29\pi}{18}\). This value lies between \(0\) and \(2\pi\), so it is the principal positive angle. The difference between \(\frac{25\pi}{18}\) and \(-\frac{7\pi}{18}\) is \(\frac{16\pi}{9}\), which is not an integral multiple of \(2\pi\). Exam tip: to convert a negative angle into its principal positive form, add \(2\pi\) as needed.

Related tags

Trigonometric FunctionsCoterminal AnglesPrincipal AngleRadian MeasureAnglesMathematicsClass 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.