Friday

May 27, 2016
**Precalculus**

Consider the equation 7sin^2x - (4sin2^x)/cosx = -1 a) Put the equation in standard quadratic trig equation form. Why is it 7sin^2x - 8sinx + 1 =0?
*Friday, January 27, 2012 by Melissa*

**trig**

What is cos(11pi/3)? Explain your thinking. What is sin(13pi/4) ? Explain your thinking.
*Friday, January 27, 2012 by BreAnne*

**trig**

Sketch a unit circle and label the terminal points corresponding to t= pi/4, 3pi/4, 5pi/4, 7pi/4. Include the coordinates of each point
*Friday, January 27, 2012 by BreAnne*

**trig**

What are the coordinates of the terminal point determined by t=7pi/6 ?
*Friday, January 27, 2012 by BreAnne*

**Trig**

tan(θ) = a (a ≠ 0), find cot(θ).
*Friday, January 27, 2012 by Jimmy*

**TRIG **

Find the remaining trigonometric ratios of θ if sin(θ) is given and θ QI sin(θ)=7/sqrt 149 cos= tan= cot= csc= sec=
*Friday, January 27, 2012 by thomas*

**trig**

how to do root3 value
*Friday, January 27, 2012 by bhavya*

**trig**

Graph f(x)= second(2x+3.14/4)
*Friday, January 27, 2012 by Anonymous*

**trig**

Determine if the value of each trig function is positive, negative, zero, or undefined. a) tan 310 degrees b) cos 7pi/6 c) sin -245 degrees d) sec( -7/2)
*Thursday, January 26, 2012 by Anonymous*

**trig**

Find the length of the circular arc intercepted by a central angle of 20 degrees in a circle or radius 5cm
*Thursday, January 26, 2012 by Anonymous*

**trig**

Find the reference angle for each given angle: a) 325 degrees b) 14pi/3 c) -190 degrees
*Thursday, January 26, 2012 by Anonymous*

**trig**

If point G(a,b) lies on the terminal side of angle theta in standard position, what is the value of sin(theta) if point G also lies on the unit circle?
*Thursday, January 26, 2012 by Anonymous*

**trig**

If point (3, -8) lies on the terminal side of an angle A in standard position, find: a) sinA b) tanA
*Thursday, January 26, 2012 by Anonymous*

**trig**

If the point (-3,0) lies on the terminal side of angle theta in standard position find: a) csc theta b) cot theta
*Thursday, January 26, 2012 by Anonymous*

**trig**

The second hand on a clock is 8 inches long. If the second hand travels a distance of 10pi inches, what is the positive radian measure of the angle that the second hand travels through?
*Thursday, January 26, 2012 by Anonymous*

**trig**

Are 22pi/5 and 100 degrees coterminal? explain.
*Thursday, January 26, 2012 by Anonymous*

**trig**

Find the exact value. Without using a calculator a) cos (-17pi/6) b) sec (3pi/2)
*Thursday, January 26, 2012 by Anonymous*

**trig**

If theta is the measure of an angle in standard position with the given conditions, find the quadrant(s) in which the terminal side of theta lies. a) cot theta < 0 b) cos theta > 0 , csc theta < 0
*Thursday, January 26, 2012 by Anonymous*

**trig**

Use a ratio identity to find tan(θ) if given the following. sin=6/sq rt 37 and cos 1/sq rt 37
*Thursday, January 26, 2012 by josh*

**trig**

Find the remaining trigonometric ratios of θ if sin(θ) = -1/6 and θ is not in QIII cos tan cot csc sec
*Thursday, January 26, 2012 by josh*

**trig**

Give the reciprocal of the following. 7/15
*Thursday, January 26, 2012 by josh*

**trig**

If sin(θ) = 8/17 and θ terminates in QI, find cos(θ)
*Thursday, January 26, 2012 by josh*

**trig**

find two values of theta, zero degrees is than or equal to theta which is less than 360 degrees, that satisfy the given trigonometric equation. tan theta equals radical 3.
*Wednesday, January 25, 2012 by damion*

**trig**

Find y if the point (7, y) is on the terminal side of θ and cos(θ) = 7/25
*Wednesday, January 25, 2012 by josh*

**trig**

a. A sector that has been cut out of circular plastic sheet which has a circumference of 12.31 m. If the central angle of the sector is 1/4 of a revolution, find the area of the sector.
*Wednesday, January 25, 2012 by rahul patel*

**trig**

What is the fundamental period of the function f(x)=4/9sinx
*Wednesday, January 25, 2012 by Bash*

**trig**

Find the length of side b to the nearest whole number if side a=105,angle A=65 degrees and angle B=37 degrees?
*Wednesday, January 25, 2012 by hd*

**trig**

how to find out maxima of function 3acos3theta
*Wednesday, January 25, 2012 by rajshri*

**trig**

not sure how to simplify tan(t+pi)/sin(t+2pi)
*Tuesday, January 24, 2012 by Jason*

**trig**

city A is 300 miles directly north of city B assuming the earth to be sphere of radius 4000 miles determine the difference in latitude in degrees of the two cities
*Tuesday, January 24, 2012 by Sachiyo*

**Trig**

If a plane takes off on runway 31 (N 31o W) and flies 4 miles, then makes a right (90o) turn and flies 11 miles, what bearing will the traffic controller use to locate the plane?
*Tuesday, January 24, 2012 by Melinda*

**trig**

If the line OP of radius and(x,y) is rotated through a certain angle about the oringin
*Tuesday, January 24, 2012 by Makhaya khoza*

**alg2/trig**

what is the smallest value of k that would make the roots of the equation x^2-2x-k imaginary? please help, no idea how to do this.
*Monday, January 23, 2012 by lisa*

**trig**

tan-5n over 3
*Monday, January 23, 2012 by Janette*

**TRIG HELP ASAP**

I need help trying to find the major and minor axis on this problem: x^2+3y^2-6x+24y+6=0
*Monday, January 23, 2012 by missy*

**trig**

How do you decide if csc=74 is greater than or less than cos=74 without using a calculator?
*Monday, January 23, 2012 by Lisa*

**Trigonometry**

What are these things called: -cos x = cos -x What are the rules to these trig rules? Thanks
*Sunday, January 22, 2012 by Trigonometry*

**trig**

4cos^2 theta = 3 where 0 degrees < theta< 360
*Sunday, January 22, 2012 by valeria hersh*

**alg2/trig**

1)3x^2-12x-21 solve by completing the square in simplest radical form 2) (1/x+3)-(2/3-x)=(4/x^2-9)find values of x 3)3/radical(3a^2b^4) is equivalent to 4) factor completely 27x^-75x^4
*Sunday, January 22, 2012 by alice*

**trig**

Please explain to me how to get this -- what quadrant tan theta < 0, sin theta < 0 is in.
*Saturday, January 21, 2012 by Jen*

**Trig**

what quadrant is this in and please explain... sin theta < 0, cos theta > 0
*Saturday, January 21, 2012 by Jen*

**trig**

5pi/7 what quadrant is it in???
*Saturday, January 21, 2012 by Jen*

**Trig**

Find the speed in both radians per second and degrees per second for the hour hand, the minute hand, and the second hand on a clock.
*Saturday, January 21, 2012 by Al B.*

**algebra 2 trig**

express the product of (2/3x^2-1/2x) and (12x+4/5) as a trinomial
*Saturday, January 21, 2012 by ally*

**trig**

How to get 5degree without using calculator using identities?
*Friday, January 20, 2012 by Laurnece*

**trig**

if you are riding on a ferris wheel that is 60 ft tall and it takes you 5 minutes to make 1 revolution, what is your linear velocity?
*Friday, January 20, 2012 by Destiny*

**Math**

Would someone verify these answers. 1. A person waves his hand back and forth, where their finger tips move past the starting position 4 cm in each direction. If he waves 20 times every 15s, what sine equation models the movement of the hand if the hand starts in the upright ...
*Thursday, January 19, 2012 by Melinda*

**trig**

I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x)= secx i(x)= cscx
*Thursday, January 19, 2012 by Claire*

**trig**

I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x0= secx i(x)= cscx
*Thursday, January 19, 2012 by Claire*

**trig**

If theta =( -7pi )/( 3) , then sec(theta) equals...?
*Tuesday, January 17, 2012 by Andreana*

**trig**

How do I get exact measures? cosine 270 degrees sin 90 degrees tan 360 degrees csc 45 degrees no calculator!
*Monday, January 16, 2012 by lola*

**trig**

how do I find this without a calculator? sin 90 degrees?
*Monday, January 16, 2012 by lola*

**geom/trig**

Using scissors to cut a rectangular piece of paper from one corner ro the opposite corner. The cut is 36 cm long and makes a 34 degree angle to the uncut edge. How many cm long is the paper (from the corner where he started the cut?
*Monday, January 16, 2012 by lola*

**trig**

I have a couple of these and cannot locate directions I can understand-please help! Draw the graph of y=3cos(2x) for 0< or= x < or = 2 pi
*Monday, January 16, 2012 by lola*

**Trig**

(x+3)^2/4^2 + (y-2)^2/5^2 The location of the Foci are at: a.(-3,-1) and (-3,-5) b. (-3,2) and (-3,5) c. (-3,-3) and (-3,7) d. (-3,1) and (-3,-5) I get (-3,2) and (-3,5) Am I correct?
*Saturday, January 14, 2012 by Don*

**trig**

From the top of a hill 700 ft. high, an observer notes that the angles of depression of two successive markerstones on a level ground, which leads straight away from the hill are 5 degree and 15 degree respectively. Find the distance between the two markerstones.
*Saturday, January 14, 2012 by Grail*

**Trig-Please check**

What are polar coordinates of (4,6) 1.Round r to nearest hundredth and theta to nearest hundredth of RADIAN My work: r^2 = x^ + y^2 r^2 = 4^2 + 6^2 r^2= 16 +36 r^ =52 r=7.21 I'm stuck on how to do theta in Radians, could you please assist
*Friday, January 13, 2012 by Angela P.*

**trig**

3x^2+16y^2=48 conic sections
*Friday, January 13, 2012 by Anonymous*

**trig**

I need help finding derivatives and antiderivatives. Given: f(x),find f'(x) 1. f(x)-2x^6 2. f(x)= -3x +7 3. f(x)= 3x^2 - 5x 4.f(x)= 1/2x^2 - x + 4
*Thursday, January 12, 2012 by Anna*

**Trig**

IfA=340°, prove that 2cosA/2 = -(v1+sinA) - (v1-sinA)
*Thursday, January 12, 2012 by Kewal*

**trig**

evaluate sin (11pi/6) to the nearest thousandth.
*Wednesday, January 11, 2012 by Rachel*

**trig**

write sec theta in terms of sin theta when theta lies in quadrant III
*Wednesday, January 11, 2012 by Bonnie*

**trig**

what is the amplitude of y=2+cos(-1/2 theta)?
*Tuesday, January 10, 2012 by Tyrone*

**Trig**

The question is: Set up a 2 column proof to show that each of the equations is an identity. Transform the left side to become the right side. a. (tan + cot)^2 = sec^2 + csc^2 I'm having trouble with this. b. (cos + sin)/cos + (cos - sin)/sin = csc sec I'm having ...
*Sunday, January 8, 2012 by Don*

**Trig**

(sin/cos)/ ( 1/cos - 1) = I'm stumped
*Sunday, January 8, 2012 by Don*

**Trig**

Proving Identities: 2 columns (tan + cot)^2 = sec^2 + csc^2 I'm having trouble breaking down the left side to = the right side.. Any help please
*Sunday, January 8, 2012 by Don*

**trig**

how do you work find sin (a-B)beta sign. sin a = 12/13,a lies in quadrant II,and cos B = 15/17, B lies in quadrant I.
*Sunday, January 8, 2012 by Kenneth*

**trig**

solve for x in the following equations: 1) sin(arcsin x) = 1 2) 2arcsin x = 1 3) cos(arccos x) = 1/3
*Sunday, January 8, 2012 by Abbey*

**Trig**

the horizontal speed of an airplane is 183mph. the magnitude of the plane's velocity is 200mph. write an expression describing the angle the angle the plane is climbing my solution: cos-1 183/200 is this right
*Sunday, January 8, 2012 by luckybee*

**trig**

express 4/5-radical 13
*Thursday, January 5, 2012 by challenger *

**trig**

express 4/5-ã13 plz
*Thursday, January 5, 2012 by challenger *

**trig**

express 4/5-ã13 plz
*Thursday, January 5, 2012 by challenger *

**Trig**

the center of a circle x^2 + y^2 + 8y =1 is a. (0,-2) b. (0,4) c. (0,1) d. (0,-4) I believe the answer is (0,4) Am I correct ?
*Wednesday, January 4, 2012 by Don*

**Trig**

The center of the circle (x+2)^2 + (y-3)^2 =1 is a. (2,3) b. (-2,3) c. (2,-3) d. (-2,-3) I believe b. is the answer, is that correct?
*Wednesday, January 4, 2012 by Don*

**Trig**

The radius of: (x+2)^2 + (y-3)^2 =9 is 3 is this correct?
*Wednesday, January 4, 2012 by Don*

**Trig**

If the center of a circle is at (2,2) with a radius of 4 the equation of the graph would be : a) (x-2)^2 + (y-2)^2 = 16 b) (x+2)^2 + (y+2)^2 = 16 I think it would be b is that correct?
*Wednesday, January 4, 2012 by Don*

**trig**

A river is 2000 ft wide and flowing at 6 mph from north to south. A woman in a canoe starts on the eastern shore and heads west at her normal paddling speed of 2 mph. In what direction (measured clockwise from north) must she aim her canoe? How long will it take her to go ...
*Wednesday, January 4, 2012 by brittney *

**trig**

prove that tan^2x+ sec^2x =1
*Tuesday, January 3, 2012 by Cindy*

**Trig**

Prove that 1 + tanAtanA/2 = tanAcotA/2 -1 = secA
*Tuesday, January 3, 2012 by Kewal*

**Trig**

Half Angle Identities cosx = 7/25 greater than 270 deg and less than 360 Determine cos 1/2x a. -7rt2/10 b. 7rt2/5 c.7/25 d.-4/5 I get 7rt2/5 Is this correct??
*Monday, January 2, 2012 by Don*

**Trig**

sinAsin2A+sin3Asin6A+sin4Asin13A/sinAcos2A+sin3Acos6A+sin4Acos13A = tan9A
*Monday, January 2, 2012 by Kewal*

**Trig**

Half angle identities Find exact values of a) cos 1/2 b) sin 1/2 c) tan 1/2 based on: cos = 1/5 greater than 270 deg less than 360 deg. I get a) - rt 3/5 b) rt24/5 and c) does not work out at all .... Help please.. book says for answers a)-rt15/5 b) rt10/5 c) -rt6/3 How do you...
*Sunday, January 1, 2012 by Don*

**trig**

for the equation 4 cos alpha - square root 12 = 0
*Saturday, December 31, 2011 by Anonymous*

**trig**

differenthate sin8x from first principle?
*Thursday, December 29, 2011 by masood*

**Trig**

If sinx = 1/4 Find the exact value of cos2x I used the formula for double angle identities : cos2x = 1-2sin^2x and got the answer 1/2 The book says the answer is 7/8 How would they get to that conclusion?
*Tuesday, December 27, 2011 by Don*

**Trig**

If tanx = 2/3 tany = 1/2 then tan(x-y) = ?? a.7/4 b.7/6 c.1/8 d.8/6 which answer is correct ??
*Tuesday, December 27, 2011 by Don*

**Trig**

sin45cos25 + cos45sin25 = ?? a. cos70 b. sin70 c. cos20 d. sin 20 which answer is correct ??
*Tuesday, December 27, 2011 by Don*

**Trig**

cos45cos25 - sin 45sin25 = ?? a. cos70 b. sin70 c. cos 20 d. sin 20 which answer is correct ?
*Tuesday, December 27, 2011 by Don*

**trig**

Matt has a large family when looking at the dates of their birthdays, he noticed that every prime day had at least one birthday. this was also true for perfect squares cubes and multiples of 3,5,7, and 11. what days (1 to 31) are not represented
*Tuesday, December 27, 2011 by Anonymous*

**Trig**

Use reduction identities to determine if the following statement is true or false: tan (A-B) = tan (B-A) Is this starement True or False ?
*Thursday, December 22, 2011 by Don*

**Trig**

Rewrite tan 88 deg in terms of its cofunction How does that end up????
*Thursday, December 22, 2011 by Don*

**I have a question concerning Spring Semester**

Im a freshman in college and I just took Chem1, Trig, and Drama (12units). I am planning on taking Chem2, Pre-Calc, and Art1 for spring sem. (13units). I'm not sure if this is too much to take for next semester considering two five unit classes or should I add another ...
*Thursday, December 22, 2011 by L.Bianchessi*

**Trig**

3. In the figure below, the perimeter of the parallelogram ABCD is (6a + 8b + 29) and the perimeter of the triangle ACD is (3a + 4b + 32). What is the length of AC
*Wednesday, December 21, 2011 by Keaton*

**Solving trig functions! urgent please help!**

1.2sinxtanx + tanx-2sinx-1=0 2.6tan^2x-4sin^2x=1 Both functions is for 0<x<2pi thank you!
*Tuesday, December 20, 2011 by Sally*

**Trig**

cot (tan + cot) = ?
*Tuesday, December 20, 2011 by Don*

**Trig**

( sec -1 )(sec +1 ) = ?
*Tuesday, December 20, 2011 by Don*

**Trig**

sin/tan = ?
*Tuesday, December 20, 2011 by Don*

**Trig - Thanks Damon and Lindsey**

Thanks a bunch
*Tuesday, December 20, 2011 by Don*

**trig**

The cross section of a television antenna dish is a parabola. A dish has a receiver that is located at the focus, 4 ft. above the vertex. Find the equation. (which I did) -- x^2 = 8y If the dish is 8 feet wide, how deep is it?
*Tuesday, December 20, 2011 by lindsey*

**Trig**

If sin = 2/3 and is a second quadrant angle, determine the exact value of sec^2 could be a. 5/9 b. root5/3 c. 9/4 d. 9/5 Please help.......
*Tuesday, December 20, 2011 by Don*