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Solve Cos^2(x)+cos(x)=cos(2x). Give exact answers

Use the quadratic formula to solve the equation. Give exact answers.2x^2 + 11x - 21 = 0 a) -3/2, 7 b) 3/2, -7 c) 3/2, 7 d) -3/2,
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2. asked by Cassie
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Solve the equation by completing the square. If the solutions are real, give exact and approximate answers. Otherwise, list the
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2. asked by Andrea
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Solve the equation by completing the square. If the solutions are real, give exact and approximate answers. Otherwise, list the
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2. asked by Andrea
3. 761 views
Solve the equation by completing the square. If the solutions are real, give exact and approximate answers. Otherwise, list the
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2. asked by Andrea
3. 620 views
solve and give answers in an exact form(16^x)[1/(2^(x+2))] = 8[(4^x)]^-1
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2. asked by stay safe
3. 471 views
Solve Cos^2(x)+cos(x)=cos(2x). Give exact answers within the interval [0,2π)Ive got the equation down to -cos^2(x)+cos(x)+1=0
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2. asked by Josh
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PLEASE HELP!!Solve: 1. cos(arcsin(4/5))= ?? 2. tan(arccos(4/5))= ?? 3. cos(arctan(3))= ?? Note: Give exact answers!!
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2. asked by jh
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I am doing volume and surface areas of 3D figures, and am running into the problem of having to give the exact answers as well
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2. asked by Dan
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Solve : cosxtanx + root3cosx - root3/2tanx - 3/2 = 0Give exact answers and formula for the general solution as well as the
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2. asked by Don
3. 491 views
please check my answers.Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original
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2. asked by Ang
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