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 the simplified value of (\frac{1-\sin^2 x}{\cos^2 x})?

Answer and explanation

Correct answer: (1)

The direct answer is 1, so option B is correct, subject to the usual domain condition that the denominator is defined. Begin with the fundamental identity (\sin^2 x+\cos^2 x=1). Rearranging gives 1−\sin^2 x=\cos^2 x. Substitute this into the fraction: \frac{1−\sin^2 x}{\cos^2 x}=\frac{\cos^2 x}{\cos^2 x}=1, whenever \cos x\ne0. Option A, \sec x, is wrong because the quotient cancels to 1, not to the reciprocal of cosine. Option B, 1, is correct. Option C, \tan x, is wrong because tangent is \frac{\sin x}{\cos x}; no such remaining factor exists after cancellation. Option D, \cot x, is also wrong because cotangent is \frac{\cos x}{\sin x}. If \cos x=0, the original fraction is undefined, so one should not claim a value there. Memory cue: when you see 1−\sin^2 x, replace it with \cos^2 x.

Related tags

Trigonometric-IdentitiesSimplification

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.