Questions on Algebra: Trigonometry answered by real tutors!

Tutors Answer Your Questions about Trigonometry-basics (FREE)

Question 337104: What is cos theta equals the square root of 2 over 2?
what is the cot theta equals 2?
Click here to see answer by Fombitz(13828)

Question 337109: Write the standard form of the equation of a line for which the length of the normal is 6 and the normal makes an angle of 120 degrees with the positive x-axis
Click here to see answer by Fombitz(13828)

Question 337106: Find the value of tan (a - b) if cos a= -3/5, sin b= 5/13, 90 < a < 180, and 90 < b < 180
Click here to see answer by CharlesG2(828)

Question 337134: Find the exact value of sin165
Click here to see answer by CharlesG2(828)

Question 337179: find f(x) and g(x) such that h(x)=(f*g)(x) and g(x)= 7-8x
h(x)= (7-8x)^3 -6(7-8x)^2 +5(7-8x) -1
Click here to see answer by stanbon(57377)

Question 337576: trigonometry question: given a point on the unit circle that corresponds to t, explain how to find tan t.
Click here to see answer by solver91311(16897)

Question 337830: Did i do this right?
g(x)=f(x-1)
They give me x= -1 and solve for g(x).
I did this:
g(x)=f(-1-1)
g(x)=f(-2)
So is -2 my answer?
Click here to see answer by jim_thompson5910(28595)

Question 337906: 6c+5d-4c-3d+3c-6d when c=4 and d=(-2)
10a+3b-5a+4b+1a+5b when a=(-3) and b=5
3m+9n+6m-7n-4m+2n when m=6 and n=(-4)

Click here to see answer by checkley77(12569)

Question 338364: how do you find:
sin 244 to the nearest ten thousandths?
Click here to see answer by Fombitz(13828)

Question 338489: (sec x + tan x)(1 - sin x)
Click here to see answer by jrfrunner(365)

Question 338497: tanx/(secx+1)
Click here to see answer by Fombitz(13828)

Question 338507: write tan teita, cos teita in terms of the second expression
Click here to see answer by Fombitz(13828)

Question 338772: a ladder of length 17 ft leans against the side of a building. the angle of the ladder is 70 degree. find the distance from the top of the ladder to the ground.
Click here to see answer by mananth(12270)

Question 338778: find the area of a circular sector of radius 4 with cental angle 6, measured in radians
Click here to see answer by mananth(12270)

Question 338779: is the statement true or false?

tan(26*)sec(26*)=1
Click here to see answer by vleith(2825)

Question 338834: a jet is traveling at 570 mi/hr at a bearing of 50 degree. After flying for 2.1 hrs in the same direction, how far the plane have traveled? round answer to nearest mile. Thanks a lot....
Click here to see answer by ankor@dixie-net.com(15657)

Question 338832: determine the exact value of: sin-1(-sq root of 2 over 2)
Click here to see answer by Fombitz(13828)

Question 339038: find csc 300 degrees. If you can show me why we arrived at a negative number?
Click here to see answer by galactus(183)

Question 339038: find csc 300 degrees. If you can show me why we arrived at a negative number?
Click here to see answer by Alan3354(30993)

Question 339049: subtract straght down to see the answer
y=2/5x-7
y=2/5x+4
Click here to see answer by stanbon(57377)

Question 339409: Find (f of g) (3) when f(x)= 3x^2-2x+1 and g(x)=sqrt(5x-6)
sqrt: means square root
Click here to see answer by stanbon(57377)

Question 339645: I don't understand how my book comes up witht these answers: If anyone can help, I'd greatly appreciate it!
Convert from polar equation to rectangular equation:
Number 1
r=4/1+2Sin(theta)
Answer is: X squared - 3Ysquared + 16y - 16 = 0
Also, this one...they ask to change it to a polar equation.
x squared - y squared = 12.
The answer given is r squared = 12sec (2theta) I don't see how they get these???
Click here to see answer by Edwin McCravy(8909)

Question 339913: Calculate the missing side of the right triangle if the hypotenuse is 12 feet and the other side is 9 feet.
Click here to see answer by jim_thompson5910(28595)

Question 339915: Find tan -1 square root 3

Click here to see answer by jim_thompson5910(28595)

Question 339074: If csc theta = -5/4 and 180degrees < theta < 270degree, find tan theta
a. -4/3
b. 3/4
c. 4/3
d. -4/5
Click here to see answer by nyc_function(2733)

Question 339978: Solve cos-1(1/2).
Click here to see answer by jim_thompson5910(28595)

Question 339550: express (2/3x-1)^2 as a trinomial
Click here to see answer by Fombitz(13828)

Question 340529: allen111@purdue.edu

Find the remaining 5 trigonometric ratios for
Click here to see answer by Edwin McCravy(8909)

Question 340736: how do you solve x/4+5 = 3x/8-1??
Click here to see answer by edjones(7569)

Question 340898: What is the angle when cot theta = -1 ? The book has the answer, I just need to know how to do it. Thanks.
Click here to see answer by solver91311(16897)

Question 340965: Find the exact value of sin(-pi/6)
a. -1/2
d. -sqrt3/2
c. -sqrt2/2
d. 2
Click here to see answer by solver91311(16897)

Question 340964: Find the exact value of cot(-315deg)
a. 1
b. sqrt 2
c. sqrt/2
d. 2
Click here to see answer by jrfrunner(365)

Question 340962: Find the exact value of cos theta if the terminal side of theta in standard position contains the point (6,-8)
a. -4/5
b. 3/5
c. 4/5
d. -3/5
Click here to see answer by jrfrunner(365)

Question 341177: i have an example problem that looks like this..
(X-12)^2=16
^2..means to the second power.
please help me understand this.
Click here to see answer by stanbon(57377)

Question 341306: please help me out with this

A communication company erects a 81-foot tall cellular telephone tower on level ground. Determine the angle of depression, theta(in degree), from the top of the tower to a point 59 feet from the base of the tower. Round answer to the decimal places.
Click here to see answer by mananth(12270)

Question 341312: let's assume a right triangle ABC. A is the angle theta but we don't know the degree. So a=5 that is the opposite side of theta, b=adjacent side that is unknown, and c=29 representing the hypothenus.
Determine the value of B. Round to two decimal places.
Click here to see answer by nerdybill(6962)

Question 341400: A) Find the value of Sin^-1 (-1/2)
B) Find the value of tan(Tan^-1 1/2)
Click here to see answer by Theo(3464)

Question 341395: Find the exact value of cos (-420 degrees)
a. -1/2
b. 1/2
c. sqrt3/2
d. -sqrt3/2
Click here to see answer by Theo(3464)

Question 341387: Which triangle should be solved by beginning with the Law of Cosines?
a. A = 115 degrees, a = 19, b = 13
d. A = 62 degrees, B = 15 degrees, b = 10
c. B = 48 degrees, a = 22, b = 5
d. A = 50 degrees, b = 20, c = 18
Click here to see answer by Theo(3464)

Question 340968: Find the right part of the identity.
CSC B/Sec B =
Click here to see answer by Fombitz(13828)

Question 340711: The accepted density for mercury is 13.6 g/mL. Calculate the percent error for each of these measurements.
(c) 13.9 g/mL
(d) 13.4 g/mL
Click here to see answer by Fombitz(13828)

Question 341428: one end of a zip-line cable is attached to the top of a 55-foot pole while the other end is anchored at ground level to a stake exactly 55sq roots of 3 from the base of the pole.Find the angle of elevation of the zip-line. Thank you
Click here to see answer by edjones(7569)

Question 341689: sinx = cos2x
Solve the equation?.....is that possible?
Click here to see answer by Edwin McCravy(8909)

Question 341687: find the volume of the triangular prism..
the base is a right angled triangle. The hypotenuse is 44cm and angle is 52 between the hypotenuse and the adjacent, the height of the prism is 56 cm..
the answer at the back is 26 299cm3 to the nearest cm... but i can't seem to get this answer any how... solution please...
Click here to see answer by edjones(7569)

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