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2cos^2 22.5-1 (find exact value)

  1. cosA= 5/9 find cos1/2Aare you familiar with the half-angle formulas? the one I would use here is cos A = 2cos^2 (1/2)A - 1 5/9 +
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    2. Anonymous asked by Anonymous
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  2. Given that Sin(A+B)=2Cos(A-B) and tan A = 1/3 ,Find the exact value of tan B.
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    2. CHRYSTABELLE asked by CHRYSTABELLE
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  3. Given that Sin(A+B)=2Cos(A-B) and tan A = 1/3 ,Find the exact value of tan B.
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    2. ceasar asked by ceasar
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  4. 2cos^2 22.5-1 (find exact value)
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    2. kk asked by kk
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  5. find the exact value of the given expression. Thank you!tan(1/2cos^-1(9/10)
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    2. Kim asked by Kim
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  6. give that sin( A + B )= 2cos(A - B ) and tan A = 1/3,Find the exact value of tanB
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    2. CHRYSTABELLE asked by CHRYSTABELLE
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  7. If cosx = 10/19 an pi < x < 2pi, find the exact value of cos x/2Use the double angle formula. Cos 2Y= sin^2 Y - cos^2Y =
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    2. Ashley asked by Ashley
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  8. find the exact solutions (¦È in degrees)sin^2¦È+2cos¦È=-2 range= 0¡Ü¦È<360¡ã see the other problem, same procedure.
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    2. Devon asked by Devon
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  9. find the points(in exact form) at which the tangent is horizontal on the given interval:y=cos(2x)+2cos(x) , [0,2pi)
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  10. find the exact solutions2cos^2x+3sinx=0 the way it stands, that is a "nasty" question. Are you sure the second term isn't
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    2. Devon asked by Devon
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