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

If θ = 25π/18, what is the principal angle of π − θ between 0 and 2π?

Answer and explanation

Correct answer: 29π/18

Direct answer: C, 29π/18. First substitute θ = 25π/18: π − θ = 18π/18 − 25π/18 = −7π/18. This value is negative, so it is not in the required interval from 0 to 2π. Add one complete revolution, 2π = 36π/18: −7π/18 + 36π/18 = 29π/18. This lies between 0 and 36π/18, so it is the required principal angle. B, 7π/18, is only the positive magnitude of the negative intermediate value; changing the sign changes the angle. A, 11π/18, and D, 31π/18, are not obtained by a valid integer multiple of 2π. Memory cue: when a reduced angle is negative, add 2π, not its absolute value.

Related tags

Principal-AngleRadian-MeasureCoterminal-AnglesTrigonometric-FunctionsAnglesTrigonometric 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.