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
Trigonometric identities specifically proving and applying $\sin^2 A + \cos^2 A = 1$
In this Class 10 Mathematics topic from Introduction to Trigonometry, students learn to understand, prove, and use the fundamental identity sin² A + cos² A = 1. The lesson connects the identity with the definitions of sine and cosine in a right-angled triangle, shows how it follows from the Pythagorean theorem, and develops methods for finding an unknown trigonometric ratio or simplifying expressions. Worked applications help students use the identity accurately while handling signs, squares, and algebraic rearrangement.
Easy · Level 1 · 1 questions
TOPIC PRACTICE
Quiz this set
Up to 1 questions from this page. Select your focus, then start.
1 questions
Choose questions
View options
sin² θ
cos² θ
tan² θ
1
Question 1EasyLevel 1
What is the simplified form of (1 + cos θ)(1 - cos θ)?(1 + cos θ)(1 - cos θ) का सरल रूप क्या है?
Correct answer:सही उत्तर:A
The correct answer is sin² θ. First use the difference of squares: (1 + cos θ)(1 - cos θ) = 1 - cos² θ. Then apply sin² θ + cos² θ = 1, which gives 1 - cos² θ = sin² θ.सही उत्तर sin² θ है। पहले वर्गों के अंतर का सूत्र लगाएँ: (1 + cos θ)(1 - cos θ) = 1 - cos² θ। फिर sin² θ + cos² θ = 1 से 1 - cos² θ = sin² θ मिलता है।
Google Analytics helps us understand site usage. Microsoft Clarity records usage interactions after analytics consent. Google may send limited cookie-free signals before your choice. The Live Visitors widget operates independently of this analytics choice; see the privacy policy for its provider and fallback details. Essential site features work without analytics cookies. You can change your choice later in Privacy choices. Privacy policy