Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
যদি cos θ = \(\frac{4x}{1 + 4x^2}\) হয়, তাহলে sin θ এর মান কত?
1
\(\frac{1 - 4x^2}{4x}\)
2
\(\frac{1 - 4x^2}{1+4x^2}\)
3
\(\frac{1 + 4x^2}{1-4x^2}\)
4
\(\frac{1 + 4x^2}{4x^2}\)