# alg/trig

4,424 results, page 15
1. ## trig

how do i find the amplitude, period, phase shift of y=2 cos(-4t-(-4 pi/3))
2. ## trig help again i cant get any of these

sin^4cos^2x=(1/16)(1-cos 2x)(1-cos4x) work one 1 side only!
3. ## Math (trigonometry)

Find the value of each of the remaining trig functions. Cscè=-4, ð<è<3ð/2
4. ## Trig

verify following trigonometric identities. 1/sec0tan0 = csc0 = sin0
5. ## Trig

evaluate exactly(without calculator): 1. sec(pi/4) 2.3sin4pi 3. tan240(degrees)
6. ## Trig

Verify that each equation is an identity. cos^2x+tan^2xcos^2x=1

8. ## trig

Given that cos A = 5/13 and A and B are both acute angles, calculate the value of Sin2A and Cos2A
9. ## trig

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

Find all angles è between 0° and 180° satisfying the given equation. cos è = 1/9
11. ## Math: Solving Trig Equation

9tan (x) - 9 sec^2 (x)/ tan (x)
12. ## Trig

If 180<A<270 and sinA= -radical(5)/3, find tan(1/2)A.
13. ## Algebra 2 with Trig

what is the index of three with the square root of negative 432
14. ## Trig.

In right triangle ABC, C is the right angle and sinA=(radical 3/2). What is the value of csc B?
15. ## Trig 2

What is the smallest value for x where y = sin 2x reaches its maximum ...wtf that means.
16. ## Trig

If sec A =5/4 and A is an angle in Quadrant IV, find the value of cos A. A. -4/5 B.4/5 C.-5/4 Is it choice A
17. ## Help me trig.

solve the equation in the interval [0,2pi) tan (t/2)-sint=0
18. ## Trig

prove that tanA divided by the sinA equals the secA
19. ## trig

simplify the expression. cos^2x+sin^2x/cot^2x-csc^2x
20. ## Maths 3u trig

If sinA = 1/3 and cosA<0 find the exact value of tan2A
21. ## trig

Find arcsin [cos (Pi/2)] The answer is 0. How do you solve this problem? Thanks.
22. ## Math

Required to Prove the following trig identity: (cos2x)^2 + (sin2x)^2 = 1
23. ## trig

use an angel sum identity to verify cos2theta = -2cos^@-1
24. ## Algebra 2/trig

How would I calculate the following function value? tan = 29degrees 36feet
25. ## just wondering...

what is harder, chemistry or physics? because i've been struggling all year in chemistry and i'm taking physics next year... i have a solid a in alg.2 though... oh yeah, and i want to be a physical therapist. so if i'm not to good in chemistry can i still
26. ## Alg 1

The owner of a hair salon charges \$20 more per haircut than the assistant. Yesterday the assistant gave 12 haircuts. The owner gave 6 haircuts. The total earnings from the haircuts were \$750. How much does the owner charge for a haircut? Solve by writing
27. ## Alg. I

A rectangle has a length of 6x^3 y^2 - 1 and a width of 3xy + 2. The formula for the perimeter of a rectangle is P=2l + 2w, where l is the length and w is the width. What is the perimeter of the rectangle? Simplify your answer.
28. ## College Alg

The intensity I of an x-ray after it has passed through a material that is x centimeters thick is given by I = I0e^–kx, where I0 is the initial intensity of the x-ray and k is a number that depends on the material. The constant k for copper is 3.2. Find
29. ## trig

find all sets of three consecutive odd integers whose sum is greater than 54 and less than 63
30. ## trig

Help find the general solution to:sin^2x-3cosx+sinxcosx-3sinx=0

32. ## trig

Help find the general solution to:sin^2x-3cosx+sinxcosx-3sinx=0
33. ## trig

Find the focus, directrix and axis of the parabola with equation x= 2y^2+3? Thank you for helping me!
34. ## trig

find the exact value of each expression. do not use a calculator. Sec 3.14/4 + 2 csc 3.14/3 4 + tan 2*3.14/3
35. ## trig

find the values of x between 0 and 2 pi where the tangent line to the graph of y = sinxcosx is horizontal
36. ## Trig Math

Solve the equation algebraically for x wohere 0 </ x< 2 pi. sin2 x = cos x
37. ## trig

if p and q satisfy the equation atanx+bsecx=c then prove tan(p+q)=2ac/a2-c2
38. ## Calculus 1 Integration Trig Inverse

integral of (4/(x times the square root of (x^2-1)) + (1+x+x^3)/(1+x^2)dx
39. ## trig

use a sum or difference identity to find an exact value cos pie/12
40. ## trig identies 5.3 &5.4

use a sum or difference identity to find an exact value pie/12
41. ## Caculus:Integration Inverse Trig

integral of (4/(x times the square root of( x^2-1)) + (1+x+x^3)/(1+x^2)dx
42. ## trig

hoW to evaluate these if cos=-12/13, A in Q II and cot B =5/12, B in Q III A) Sin^2 A (the sign ^ is power of)
43. ## trig

Prove the identity. (must work with left side) (1-2sin(x)^2)=(cos(x)^2)
44. ## Trig

2sin^2(x) = 2 + cos(x) interval [0,2pi) How do I solve this? Help would be greatly appreciated!
45. ## trig

Solve for x if sin2x=cos(x+60 and x€ [-90,180].show all work details
46. ## trig

use a half angle formula to find the exact value of cos 75 degree
47. ## trig

convert to degrees, minutes and seconds 3pi/2 radians can u plz help
48. ## Pre-calc/Trig

For each parabola, find the vertex and focus. x= (1/400)y^2 y= 1/8(x-3)^2-1
49. ## Pre-Calc/Trig...

am i correct? What is the axis of symmetry for the graph of y=2x^2-4x+2? x=? the line goes through 1? x=1
50. ## Pre-calc/Trig

For each parabola, tell in which direction the graph opens. x= 1/2y^2 y= -1/24x^2
51. ## trig

PERIMETER OF A RECTANGLE IS 32CM AND AREA IS 55CM FIND THE LENGHT.
52. ## Pre-Calc/Trig...

Which of the following could be an example of a function with a domain (-oo,oo) and a range (-oo,2)? Check all that apply. A. y= -(3)^x+2 B. y= -(3)^x-2 C. y= -(0.25)^x+2 D/ y= -(0.25)^x-2
53. ## trig

write the expression sin4xsin5x as a sum or difference of trigonometric functions
54. ## trig

Find all solutions to the equation 2cos(2x) = x + 1, correct to 4 decimal places.
55. ## trig

A sine wave function f(x) = a sin(bx) has amplitude 10 and period 40. What are the values of a and b? (A) a = 10 and b = 20/pi ( B) a = 10 and b = 1/40 (C) a = 10 and b = pi/20 (D) a = 10 and b = 40 E) None of the above.
56. ## trig

find the exact value by using the appropriate half-angle identity: sin(5pi/12)

58. ## Trig

How do you find an equation of a line perpendicular to y=x at the point (5,5) in standard form?
59. ## TRIG

find: sin 23pi/12 i got totally the wrong answer how do i approach this?
60. ## trig

A right triangle has sides of length 5, 12 and 13. What is the sine of the angle opposite the hypotenuse? (A) 1 (B) 5/12 (C) 5/13 (D) 12/13 (E) None of the above.
61. ## trig

P(2, 9) is a point on the terminal side of è in standard position. What is the exact value of tan è?
62. ## math - trig

Why cant we solve an oblique triangle with the Law of Sines if we are given SAS?
63. ## trig

angle a is acute and sin = u. find the other five trigonometric functions in the terms of u.
64. ## trig

Find all values of x in the interval [0, 2π] that satisfy the equation. 6 sin2(x) = 3
65. ## trig

Find the exact value by using a half-angle identity. cos 22.5 degrees
66. ## pre cal\trig

Find the following cot(Arccsc 25/24) show your work
67. ## Trig

y=sin(2pi*x-pi) find the amplitude, period, and phase shift
68. ## Trig

Hi. Can somebody help me solve this equaton with EXACT answers? ----- sin3x = 0 ----- Thankyou! All help is appreciated.
69. ## trig

Write an expression that gives all solutions to the equation sin x + cos x = - radical 2
70. ## trig

how can you find points of a tri equation at orgin 1/4, 1/2, 3/4, and end of the period
71. ## alg2/trig

If 4x^2+9=kx, what value of k will produce equal roots? the answer is 12 but i don't understand how you get it, please help!
72. ## Pre-Calculus/Trig...

Help Please For the function defined by: f(x)= (x^2,x≤1) (2x+1,x>1) Define f(0). and also how would i graph f(x)?
73. ## trig

Use half-angle formulas to find the exact value for the following cot 75 degrees
74. ## Calculus (trig stuff)

given a angle how do I find it's point P on the unit circle?
75. ## trig

Write the measure in radians. Express the answer in terms of ð -260°
76. ## trig plz help

Solve, finding all solutions in the interval [0, 2π). tan(3x) = -1
77. ## trig

Rewrite 3pi/25 in degree measure. Round to three decimal places.
78. ## trig

Evaluate each value as a trigonometric function of an angle in Quadrant 1. #1 cos (27pi/8)
79. ## trig

Give the following for the function: y=2+cos(5x+3.14 Amplitude: Period: Phase Shift:

81. ## trig

Find the solutions to the equation cos2x=sinx and 2cos^2x-3cosx-3=0
82. ## Trig

Use a cofunction to write an expression equal to csc(4ð/11). I need help solving this problem. Thank You
83. ## trig

evaluate the trigonometry function using its period as an aid cos(-7pi/3)
84. ## Trig

Find all solutions of equation on interval [0,2pi] 1=cot^2x + cscx
85. ## Trig

Find all solutions of the equation on the interval [0,2pi): Tan^2x=1-secx
86. ## trig

write y=sinx-cosx in the form y=ksin (x+a), where the measure of a is in radians.
87. ## trig help

Find the equation of the hyperbola satisfying the given conditions. Vertices at (5, 1) and (-7, 1); asymptotes (y - 1) = 1/3(x + 1) and (y - 1) = -1/3(x + 1)
88. ## math

In right triangle ABC, a = 52 ft and c = 63 ft. Which of the following trig ratios of angle B, would combine the given sides?
89. ## trig

what is the angle of elevation of a 15 foot ladder leaning 12 feet up a building?
90. ## Calculus

1. integral (x^3 * sqrt(x^2-4)) dx I'm confused on how to start this problem, if I am doing trig substitution.
91. ## trig

how come you get different answers if you take different paths in trigonometry? (when you choose to use sin, cos or tan)
92. ## Math calculus-Trig

Find the area bounded by the curve and the lines y = -x^2 - 4x; y = 1; x = -3; x = 1
93. ## trig

How do you find all the solutions of the equation in the interval [0,2π)? 3tan^3x=tanx
94. ## Trig.

Please solve this equation. As you write down the steps, please give me a description on what you did. y^3 - 16y^3/2 + 64 = 0
95. ## trig

how do you use doubel-angle formulas to find sin, cos, and tan
96. ## Trig

help please!: (sinx + sin2x +sin3x) / (cosx + cos2x + cos3x) = tan2x
97. ## trig

determine the amplitude,period and phase shift of y=-2cos(pix-3)
98. ## trig

solve the equation 2 sec x- tan x = cot x for the interval 0 to 360
99. ## CALCULUS HELP!!!

integrate 1/(x^2sqrt(1+x^2)) i know you have to use trig sub but iono how to cancel out some terms...much help is appreciated
100. ## Trig

Find the area of the triangle. b=125 c=162 <B=40 (b and c are the sides) (<B is the angle)