Find the Exact Value cos(510). Make the expression negative because cosine is negative in the second quadrant. The exact value of cos(30) is √32 . The result can be shown in multiple forms.People also askYou will see more English now.How do you find exact value of cos?What's the value of cos?What is the exact value of cos 60?Why is the cosine of 90 1?FeedbackQuestions & answersSocraticQuestionHow do you find the exact value of cos(−30)?Answer · 0 votescos(−30)=cos30=cos(π6)=√32=0.866Explanation:To get exact value of cos(−30)http://www.ask-math.com/all-sin-cos-tan-rule.htmlcos(−30) is in IV quadrant where only cos and sec are positive.Hence cos(−30)=cos30=cos(π6)From the above table,cos(−30)=cos30=cos(π6)=√32=0.866MoreStack ExchangeQuestionFind the Exact Value of the following Cosine FunctionAnswer · 0 votesUse the second one. Negative means you go backwards (clockwise) so -5π/4 would be 3π/4.After edit: That seems right :)MoreSocraticQuestionHow do you find the exact value of cos π/3?Answer · 0 votes⇒12Explanation:cos(π3)=cos60∘=12https://www.quora.com/How-do-I-use-a-unit-circle-in-mathMoreNumeradeQuestionFind the exact value of cos( tan-1 '(3))Answer · 1 voteBut I'm a teacher for this question and the question says that find the exact value of course of 10 years of five bed with so cause of 10 in Warsaw five paid 12. So the operating at this course of 10 years of rituals celebrating this as cause of course, inwards, perpendicular and basis of perpendicular is five versus jewel. The Hippopotamus can be written as the square root of 12 square plus or five square, So the hypothesis can be witnessed brutal of 169. That is 30. So of course, of course, winners of best buy means 12 by 13 year. So I'll be writing that cause and cause and was get canceled. You will be writing the answers. 1213. I hope this answer the question. Thank you.MoreStudy.comQuestionFind the exact value of cos⁡(2α) given that sin⁡α=711 and α is in quadrant II.Answer · 0 votesThe given data is: sin⁡α=711Our objective is to find the value of cos⁡2α.Using the double angle identity cos⁡2α=1−2sin2⁡α we get: cos⁡2α=1−2sin2⁡α=1−2(711)2=1−2×49121=1−98121=23121Hence, the required value is: cos⁡2α=23121MoreCheggQuestionFind the exact value of cos(u + v) given that sin u = -3/5, with u in quadrant III, and sin v = 12/13, with v in the quadrant II. cos (u + v) = (Simplify your answer. Type an integer or a simplified fraction.)Answer · 0 votesConsider the trigonometric equation, sinu=(-3)/5 , with u in quadrant (iii) . sinv=12/13 ,with v in quadrant ii . The objecti.MoreBrainly.comQuestionFind the exact value of cos(a + b), given sin a = 2/5 for a in Quadrant || and cos B = 1/3 for b in Quadrant IV.Answer · 40 votesAnswer:Option (4)Step-by-step explanation:cos(a + b) = cos(a)cos(b) - sin(a)sin(b) [Identity]Since, sin(a) = [tex]frac{2}{5}[/tex] for a in quadrant IITherefore, cos(a) = [tex]sqrt{1-text{sin}^2(a)}=sqrt{1-(frac{2}{5})^2}[/tex]cos(a) = [tex]frac{sqrt{21}}{5}[/tex] But cosine of a is negative quadrant IITherefore, cos(a) = -[tex]frac{sqrt{21}}{5}[/tex]And cos(b) = [tex]frac{1}{3}[/tex] for b in quadrant IVTherefore, sin(b) = [tex]sqrt{1-text{cos}^{2}b}[/tex] = [tex]sqrt{1-(frac{1}{3})^2}[/tex] = [tex]frac{2sqrt{2}}{3}[/tex]But sine of an angle is negative in quadrant IV,Therefore, sin(b) = [tex]-frac{2sqrt{2}}{3}[/tex]Now substituting these values in the identity,cos(a + b) = [tex](-frac{sqrt{21}}{5})(frac{1}{3})-(frac{2}{5})(-frac{2sqrt{2}}{3})[/tex] = [tex]-frac{sqrt{21}}{15}+frac{4sqrt{2}}{15}[/tex] = [tex]frac{4sqrt{2}-sqrt{21}}{15}[/tex]Therefore, Option (4) will be the answer.MoreCheggQuestion15 Find the exact value of cos 8, given that sin = and 0 is in quadrant II. Rationalize denominators when applicable. 17 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Simplify your answer. Type an exact answer, using radicals as needed. Type an integer or a fraction.) A. cos 8= B. The function isAnswer · 0 votes1. Given that sintheta = 15/17 and we know that ,costheta= sqrt(1-sin^2theta) costheta =sqrt((1-15/17)^2) = sqrt((289-225)/289) = 8/17 As angle is in sercond quardent then cosine will be negativ.MoreTopprQuestionHow do you find the exact value of cos [ -7pi/6 ] ?Answer · 1 votecos (-7pi6) = - (√(3)2) First steps cos (-7pi6) = cos (76pi) because cosine is an even function (for evry x f ( - x) = f(x)) Now you have to reduce cos (76pi) o a value of a functon of an angle smaller than pi2rad . To do this you use the formula cos (pi + x) = - cos(x) . So you get cos (76pi) = - cos (pi6) = - √(3)2MoreByju'sQuestionHow do you find the exact value for cos240-Answer · 13 votesCompute the value of the given expression:Given: cos(240°)=cos(270° 30°)using identity cos(270° A)= sin(A)cos(270° 30°)= sin(30°)0ex0ex⇒cos(240°)= 1/2Therefore, .MoreVedantuQuestionHow do you find the exact values of [cos left( {67.5} right)] using the half angle formula?Answer · 0 votesHint: By using trigonometric functions, we can apply the trigonometric ratios for the particular angle and find its value, there are trigonometric ratios for different angles. In this question to find the value of [cos x] we mainly use the half angle formula of cosine which is given by,[cos x = pm sqrt {dfrac{{1 + cos 2x}}{2}} ],Complete step-by-step answer: Half angle formulas allow the expression of trigonometric functions of angles equal to [dfrac{x}{2}] in terms of [x], which can simplify the functions. Half-angle formulas are useful in finding the values of unknown trigonometric functions.Now given trigonometric ratio is [cos left( {67.5}ight)],Using half-angle formula of cosine is given by [cos x = pm sqrt {dfrac{{1 + cos 2x}}{2}} ] ,So, here [x = 67.5],Now the formula becomes, [ Rightarrow ][cos 67.5 = pm sqrt {dfrac{{1 + cos 2left( {67.5}ight)}}{2}} ],Now simplifying we get,[ Rightarrow cos 67.5 = pm sqrt {dfrac{{1 + cos left( {1…MoreWyzantQuestionfind the exact value when cos theta= -1/3, pi/2New Balance Tennis Shirt, Find the Exact Value cos(825) - Trigonometry Examples. The exact value of cos(105) is −√6−√24 - 6 - 2 4 . Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the . Montres De Luxes Hommes, How do you find the exact value of cos(-30)?. Mar 17, 2018 · 1 answercos(−30)=cos30=cos(π6)=√32=0.866. 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