Search results
Free Pre-Algebra, Algebra, Trigonometry, Calculus, Geometry, Statistics and Chemistry calculators step-by-step.
Solve: cos2x > sin2x. https://math.stackexchange.com/q/1605476. \cos^2x>\sin^2x\iff\cos2x=\cos^2x-\sin^2x>0 \iff2n\pi-\dfrac\pi2<2x<2n\pi+\dfrac\pi2 where n is any integer. cos2x> sin2x cos2x = cos2x−sin2x > 0 2nπ− 2π < 2x < 2nπ+ 2π where n is any integer.
Examples. \left. \begin {cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end {cases} \right. Solve your math problems using our free math solver with step-by-step solutions. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more.
Definite integral mean square. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music….
15 kwi 2015 · Learn how to use Pythagorean identity and quadratic equation to solve for x: cos^2x-sin^2x=sinx. See two different methods and answers with explanations on Socratic.
Go Pro Now. cos^2x sin^2x. Natural Language. Math Input. Extended Keyboard. Examples. Upload. Have a question about using Wolfram|Alpha? Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals.
3 mar 2016 · 2 Answers. Konstantinos Michailidis. Mar 3, 2016. It is. cos2x − sin2x = − cosx ⇒ cos2x − (1 − cos2x) = −cosx ⇒ 2 ⋅ cos2x + cosx − 1 = 0 ⇒ (cosx +1) ⋅ (2 ⋅ cosx − 1) = 0. Hence form the last equation we get. cosx = − 1 ⇒ x = 2 ⋅ k ⋅ π± π where k is an integer.
