Most popular questions and responses by Trig
  1. Trig

    As you ride a ferris wheel, your distance from the ground varies sinusoidally with time. When the last passenger boards the ferris wheel and the ride starts moving, let your position be modeled by the diagram provided. Let t be the number of seconds that

    asked on March 22, 2012
  2. math

    kamala had 5026 grams of flour in a canister. she bought a 4157 gram bag of flour. she poured some flour from the bag to the canister. as a result, the mass of the flour in the canister is now twice the mass of the flour left in the bag. how much flour is

    asked on October 31, 2014
  3. trig

    h t t p : / / i m g 4 0 . i m a g e s h a c k . u s / c o n t e n t . p h p ? p a g e = d o n e& l = i m g 4 0 / 1 4 8 / a s d a s d y e . j p g & v i a = m u p l o a d (def of tan theta = a^-1 o)a = o opposite = adjacent tan theta written with respect to

    asked on September 6, 2009
  4. Trig

    Two observers 1 km apart spot an airplane. The angles of elevation of the airplane from the two observers are 22 degrees 50 minutes and 24 degrees 40 minutes. If the observers and the airplane are in the some vertical plnae, compute the altitude of the

    asked on September 10, 2009
  5. Trig

    h t t p : / / m a t h c e n t r a l . u r e g i n a . c a / Q Q / d a t a b a s e / Q Q . 0 9 . 9 9 / a n g e l a 2 . 2 . g i f give that picture how do I solve for (h) I know that you you From the diagram tan(3.5) = h/(13 + x) and tan(9) = h/x. Solve the

    asked on August 27, 2009
  6. Math

    Nasreen is designing an obstacle course that includes two ladders leaning against a pole. In order for the ladders to fit in the obstacle course, one ladder must span 1.6 m horizontally and the other must span 5 m horizontally. She already has one 4.3-m

    asked on November 14, 2017
  7. trig

    rewrite each equation in polar form. solve for r if possible a. 2x+3y=5 b. y=1/2x

    asked on November 25, 2014
  8. Ske

    If Shella has a pulse rate of 73 beats per minute and a blood pressure of 121 over 85 and this can be modeled by a sinusoidal function, find this equation. Could you explain to me how to do this step please by showing me the steps? Thanks

    asked on May 7, 2009
  9. Maths

    A yacht sets sail from a harbour and sails on a bearing of 065T for 3.4km. it then turns and sails on a bearing of 127T for another 5km. On what bearing (to the nearest minute) should the yacht sail if it was to travel directly back to the harbour?

    asked on November 18, 2016
  10. Trig.

    sec^2xcotx-cotx=tanx (1/cos)^2 times (1/tan)-(1/tan)=tan (1/cos^2) times (-2/tan)=tan (-2/cos^2tan)times tan=tan(tan) sq. root of (-2/cos^2)= sq. root of (tan^2) sq. root of (2i)/cos=tan I'm not sure if I did this right. If I didn't, can you show me the

    asked on January 9, 2010
  11. Trigonometry

    Prove that (cosy/1+siny) + (1+siny/cosy) = 2secy

    asked on November 9, 2008
  12. trig

    Solve tan2A - 2tanA = -1 for 0º≤A≤360º.

    asked on November 12, 2012
  13. math

    After leaving a runway a planes angle of ascent is 15 degrees and its speed is 265 feet per second. How many minutes will it take for the airplane to climb to a height of 11,000 feet?

    asked on February 18, 2014
  14. trig

    Find all real numbers in the interval [0,2pi) that satisfy the equation. cos^2 x+2 cos x+1 = 0

    asked on July 4, 2013
  15. Math

    How do you do this..i have the answer i just need a step by step way to solve this.. sec(sin^-1 (2/5))

    asked on November 14, 2011
  16. TRIG

    please help two questions h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 5 2 9 6 7 1 5 7 also A surveillance satellite circles Earht at a height of h miles above the surface. Suppose that d is the distance, in miles, on the

    asked on September 14, 2009
  17. Anonymous

    Give the exact intersection point for the equations f(x)=4sin^2x+7sinx+6 and g(x)=2cos^2x-4sinx+11 Ok, my result is that there is no intersection point because if you put f(x)=g(x) and try to solve for x or the intersection point, the LS f(x) is not

    asked on May 8, 2009
  18. lena

    -sinx-cosx = 0 x=? please and thank you! i'd appreciate it!

    asked on November 30, 2008
  19. trig

    simplify the expression. (sin^2x+cos^2x) - (csc^2x-cot^2x)

    asked on July 14, 2013
  20. Trig

    How come cosine of 225 degrees is a positive number i thought it was negative because it's reference angle would be 45 degrees below the second quadrant and in a unit circle cosine is just the x value so I thought cosine of something in both the second and

    asked on November 3, 2009
  21. Trig

    I have no idea how to do this problem From an airplane flying 2 kilometers aboce the ocean, a piolet sees two ships directly to the east. The angles of depression to the ships are 8 degrees 20 minutes and 75 degrees 40 minutes how far away are the ships? I

    asked on September 11, 2009
  22. Trigonometry

    Prove that (3cos^2x + 8sinx-8/cos^2x) = (3sinx-5/sinx+1)

    asked on November 9, 2008
  23. trig

    simplify the expression. cot^2(x)-csc^2(-x)

    asked on July 14, 2013
  24. Trig

    Multiply and Simplify. ( 1 + cot θ )^2

    asked on July 4, 2013
  25. Anonymous

    study of sunspots. spots in a year min. is 10, max is 110. between max's of 1750 & 1948, 18 cycles occurred. Find a sinusoidal equation to model this. My equation looks something like this so far: y=50sin(2pi/11(x-d))+60 so How do I get the phase shift? d?

    asked on May 7, 2009
  26. Trig

    Find all of the solutions between 0 and 2pi: 2sin(x)^2 = 2 + cos(x)

    asked on November 13, 2008
  27. trig

    ok I'm trying to solve for an angle knowing adjacent and opposite of a triangle so I do tangent by definition tan theta = a^-1 o how do I algebraically solve for theta

    asked on July 30, 2009
  28. trig

    Find all solutions in the interval [0,2pi]. sin 2x + sin x = 0

    asked on July 4, 2013
  29. Jolly

    Find the magnitude and direction angle for the given vector. 12√(2), -12√(2)

    asked on June 30, 2013
  1. Maths

    Thanks, i got roughly the same answer, 282.

    posted on November 18, 2016
  2. math

    Thanks so much!

    posted on February 18, 2014
  3. trig

    I figured out that tan(theta)=-1 is 3pi/4+n(pi)

    posted on March 22, 2012
  4. Trig

    why wouldn't you use the 30 degree angle? I did 360 -90 to get 270 degrees and then did 300 - 270 to get 30 degrees and used that angle why would I use the 60 degree angle instead of the thirty

    posted on November 3, 2009
  5. Trig

    I think i was in radians my bad um how come tan of 300 is negative root three tangent in unit circle is y/x I am getting .5/(root three/2) which is not root three

    posted on November 3, 2009
  6. Anonymous

    I mean, so would d = 1747.25 ie y=50sin(2pi/11(x-1747.25))+60

    posted on May 7, 2009
  7. Anonymous

    How did you get 1750-d=11/4?

    posted on May 7, 2009
  8. SUMS?

    1+3=4 1+3+5=9 1+3+5+7=16 1+3+5+7+9=25 You just square how many consecutive odd numbers you're adding together. So it's n^2.

    posted on November 13, 2008
  9. English

    It does, doesn't it?

    posted on November 13, 2008
  10. MATH

    Let x be the number. You multiply that number by 7 SO FAR WE HAVE: 7x You add 15 to that number SO FAR WE HAVE: 7x+15 You subtract 3^2 (which is 9) from that number SO FAR WE HAVE: 7x+15-9 When you do all of that to the number, you get 48 THE FINAL

    posted on November 13, 2008
  11. math

    x + 3 + 4x = 23 5x + 3 = 23 5x = 20 x = 4

    posted on November 13, 2008
  12. Math

    THE SIDES ON A 30-60-90 TRIANGLE: Short Side = x Long Side = sqrt(3)*x Hypotenuse = 2x In this case: Short Side = 7.5 Long Side = sqrt(3)*7.5 Hypotenuse = 2*7.5

    posted on November 13, 2008
  13. 2nd grade

    wooden ( I went to Google, searched for "anagram", clicked on the first link, pasted "oedown" into the box, and clicked "Get anagrams" )

    posted on November 13, 2008
  14. 3rd grade

    Sorry, I read that wrong. Plural Possessive = More than 1 that own something (Add an s and add an apostrophe after it) elephant trunks'

    posted on November 13, 2008
  15. 3rd grade

    Plural Positive = More than 1 (there's an 's' at the end) elephant trunks

    posted on November 13, 2008
  16. math

    (x,y) MOVE LEFT : Subtract however many units left you go from x MOVE RIGHT: Add however many units right you go to x MOVE UP: Add however many units up you go to y MOVE DOWN: Subtract however many units down you go from y ^ Do that for all 3 vertices ( D,

    posted on November 13, 2008
  17. chem

    (Pressure doesn't matter here either, since it remains constant. So you're left with V/T=V/T, which is Charles' Law.)

    posted on November 9, 2008
  18. chem

    PV/nT = PV/nT UNITS: ------ P: atm (convert kPa to atm) V: L (convert cm^3 to L) n: mol (moles don't matter in this problem) T: K (convert C to K) ( They need to fit with the ideal gas constant [R]'s units: [L*atm/K*mol] )

    posted on November 9, 2008
  19. AP Chem

    Temperature must always be in Kelvin! Add 273 to the temperature in Celsius to get the temperature in Kelvin. In this case: INITIAL TEMPERATURE = 22+273 = 295 K FINAL TEMPERATURE = -197+273 = 76 K

    posted on November 9, 2008
  20. AP Chem

    ( You only use PV=nRT when none of the variables change. In this case the temperature is changing, so you use PV/nT = PV/nT )

    posted on November 9, 2008
  21. AP Chem

    Always start with PV/nT = PV/nT, where P is the pressure, V is the volume, n is the number of moles, and T is the temperature. Take out whichever terms you don't need. In this case, you don't need n (the number of moles), so you're left with: PV/T = PV/T

    posted on November 9, 2008
  22. Trigonometry

    (3cos^2x + 8sinx-8)/cos^2x = (3sinx-5)/sinx+1

    posted on November 9, 2008