# alg/trig

4,413 results, page 20

1. ### trig

Suggest a sine function that will "imitate" the cosine function by manipulating ONE of a,b,c or d. Thank you
2. ### trig

Suggest a cosine function that will "imitate" the sine function by manipulating ONE of a,b,c or d. Thank you
3. ### trig

Find the exact value of cot 45°, if the expression is undefined write undefined.
4. ### trig

If A+B+C=^(^=180) prove that sinA + sinB - sinC = 4sinA/2 sinB/2 cosC/2

sin^6 x + cos^6 x=1 - (3/4)sin^2 2x work on one side only!
6. ### trig!!

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

triangle with side lengths 172m, 155m, and 155m. calculate the area.
8. ### trig

DISCUSS THE POSSIBLE VALUES OF THETA IF THE RATIO IS COS THETA IS EQUAL TO 0
9. ### trig

Verify the Identity: sec(x/2)=the square root of (2 tanx/(tanx sinx))
10. ### Trig

Solve the equation in the interval [0•,360•] Csc theta = 1+cot theta
11. ### trig

explain the methid used to get the answers 45m*cos33=37.7m and 45m*sin33=24.5
12. ### Trig

How do you convert rectangular equations into polar equations? If x4−y4=xy , then r2=atan(b); What is a? What is b?
13. ### trig

i have to find a & c, b=2.489*10 to the nineth power and i have one degree 25
14. ### trig

the question is: given sec x = 4, tan x < 0, find sin(2x), cos(2x)and tan (2x)
15. ### Math/Trig

Solve: 2 cos2 x - 3 cos x + 1 = 0 for 0 is less than or equal to x is less than 2pi.
16. ### trig

prove the identity sec^2x times cot x minus cot x = tan x
17. ### trig

if sina,cosa,tana are in geometric progression then prove that cot^6a-cot^2a=1
18. ### trig

convert the point with polar coordinates (2,7pi/6) into rectangular coordinates.
19. ### trig

Verify the equation is an identitiy: cot(x)tan(x+pi) - sin(pi-x)cos((pi/2)-x) = cos^2x Thanks
20. ### trig

The tangent of an acute angle equals 1/2. What is the sine of the angle? (A) 1/p3 (B)p5/2 (C) 2/p5 (D) 1/p5 ( E) None of the above.
21. ### trig

5. If the angles X and Y each measure between 0° and 90°, and if sinX = cosY, what is the sum of the measures of the angles X and Y?
22. ### trig

How do I solve.... Tan 2(theta) - Cos 4(theta) = 0 Domain: (0-360 degrees) Thank you.
23. ### Math/Trig

Which logarithmic equation is equivalent to L^m = E 1) LogL E = m 2) logE L = m 3) logm E= L 4) logE m= L
24. ### trig

solve the equation of the domain 0¡Ü¦È¡Ü2¦Ð 3cos^2theta - 5costheta -1 = 3sin^2theta
25. ### trig

given cot-A square root of 5, find cot-B at the 4th quadrant.
26. ### TRIG

Given that tanx = 1/sqr(15) and secx -4/sqr(15) find the value of sinx
27. ### trig

if tan x= 4/3 and pip < x < 3pi/2, and cot y= -5/12 with 3pi/2 < y < 2pi find sin(x-y)

29. ### Precalculus with Trig

Rewrite the following expression as an algebraic expression in x: cos(arcsin(x))

31. ### math trig

a triangle abc has a mearsure of an adjacent 15 and 25 degree solve for the triangle
32. ### Pre-Calc/Trig...

Explain how the graph of the given function is a transformation of the graph of y=x^2 *y=x^2+7
33. ### Pre-Calc/Trig...

Explain how the graph of the given function is a transformation of the graph of y=x^2 *y=(x+5)^2
34. ### Pre-Calc/Trig

How would I solve this one? I just can't get this one. 6x^2+11x-35=0
35. ### trig

solve triangle ABC which have angleA=25.25,angleB=60.51 and a=3.82..find c...,find b
36. ### trig

A road has a 10% grade (slope). To the nearest degree what is the angle of elevation of the road?
37. ### Trig

Find the algebraic expression that is equal to sec theta - cos (-theta)
38. ### Trig

Find sin(x+y), cos(x-y), tan(x+y), and the quadrant of (x+y) if sinx= -1/4, cosy= -4/5, with x and y in quadrant 3.
39. ### Math (Trig) lowering powers

If cos^4(3x)-sin^4(3x)=cos(g(x)) then g(x)=? Use a^4-b^4=(a^2-b^2)(a^2+b^2)! thanks in advance for any help!
40. ### trig

if sec theta =sqrt -20/3 state the exact value of tan theta
41. ### Math (Trig)

Solve the equation for exact values of x. sin(x) = 1-2(sin(x))^2
42. ### simplyfying expressions (trig)

can anyone tell me how to do this? thanks! (sin (x) / 1 + cos (x) ) + ( cot (x) / 1 + cos (x) )
43. ### Algebra II/Trig

Simplify: 1/5(-5a^2b^3)^2(abc)^4 How do you simplify this. How does the "-5" play a role in this? how would you get 1/5 of "-5"
44. ### Trig Proofs

Please solve this proof Tan(pi/4 +x)+ Tan(pi/4+x)= 2Sec2x
45. ### 11th grade Algebra 2/ Trig

The expression log 10^(x+2)- log 10^x is equivalent to???
46. ### trig

unsure how to find phase shift,vertical shift of y=-2cos(x+3.14/4)+5
47. ### trig

determine the coterminal angle between -360 and 360 for -540
48. ### trig

How do you find the exact values of sin(u/2), cos(u/2), and tan(u/2) of tan(u)=-5/8
49. ### trig

How do you convert polar coordinates to Cartesian coordinates? And vise versa.
50. ### trig

tan(theta)=(7/24), sin(theta)<0 find cos(2theta)
51. ### Trig

Tan theta 12/5 ,pi <theta<3pi/2 Find sin 2theta
52. ### trig

If cscx=2 and x greater 90 degrees and x less than 180 degrees, then sin x/2 =
53. ### trig

Plot the point and then find three representation of the point (3,2pi/3)
54. ### trig

Suppose that sin x = 1/5 and cos y = 2/3, and x and y are each angles in Quadrant 1. Determine sin(x+y).
55. ### trig

let sin theta = -7/25 with theta in QIV find sec (2theta)
56. ### trig

True or false? If A and B are angles of a triangle such that A > B, then cos A > cos B.
57. ### trig

angle x lies in quadrant 3 and cos(x)=-.6. Find cos(3pi/2-x)
58. ### trig

an angle 30 with the distace of 24km and an angle of elevation of 45 with the distance of 15km.
59. ### trig

how do you solve 2nd cos 6/11 (my calculator doesn't have 2nd function0
60. ### trig

Verify that each trigonometric equation is an identity tan^2+1/sec Î± =sec Î±
61. ### trig

Find sin(2theta) if tan of theta = 7/24, pi < theta < 3pi/2 ?
62. ### trig

Derive the identity 1 + cot ^2 theta = csc^2 theta by dividing x^2 + y^2 = r^2 by y^2
63. ### trig

1.Ifg(x)=cos4x,find g'(pie/24). 2.Differentiate y=csc^2 pie*x
64. ### trig

To the nearest degree, determine the measure of <X for each value of tan X if the tan X = 0.25
65. ### Trig

Solve the equation in the given domain cos 4x + cos 2x = 0, 0<(or equal to) x < pi
66. ### trig

A and B are acute angles such that cosA =3 over 5 and cosB =12 over 13
67. ### trig

Prove that the statement is an identity: (tanx/cscx)=(1/cosx)-cosx
68. ### Trig

what quadrant is this in and please explain... sin theta < 0, cos theta > 0
69. ### trig

Please explain to me how to get this -- what quadrant tan theta < 0, sin theta < 0 is in.
70. ### trig

Find y if the point (7, y) is on the terminal side of θ and cos(θ) = 7/25
71. ### trig

If csc theta = 2, then what is theta approximated to 4 decimal points? RADIANS
72. ### math/cal/trig solve for t

solve for t: 0=4sin(2t)cos(2t)-sin(2t)
73. ### trig

If sec theta = radical 5, what is the exact value of cos theta
74. ### trig

If sec theta = radical 5, what is the exact value of cos theta
75. ### trig

find the single term of cos^2 4theta - sin^2 4theta
76. ### Precalc/Trig

Find all values of x, 0<x<(pi/2) for which (1/( root 3))<cotx<(root 3)
77. ### trig

Find the Opposite of the right angle where the angle is 61 degrees and the Adjacent is 10 cm.?
78. ### Trig

The point P(3, 4) is on the terminal side of θ. Evaluate tan θ. 3/4 3/5 4/3 4/5
79. ### Trig

How do I prove that tan(x/2) =( plus/minus) sqrt(1-cos(x/1+cos(x))
80. ### Trig

Simplify (sin^2)*(67.5deg) - (cos^2)*(67.5deg) and then evaluate exactly.
81. ### Trig

Verify that each trigometric equation is an identity. 1/1-sinx + 1/1+sinx = 2 sec^2x

Prove the identity: cos^4 x + sin^4 x = 1 - (1/2)sin^2 (2x)
83. ### trig, math

In a right triangle with g the right angle, b = 86.5 and c = 125.8. What is β ?
84. ### trig

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

a triangle has a measured of hypoteneuos 15 and an adjacent of 10 solve for the triangle.
86. ### Trig

Given sin x = 5/13 and 0 < x < pi/2 find the value of sin(π − x). 12/13 5/13 -12/13 -5/13
87. ### Pre-Calc/Trig...

Help me please. Simplify 1. √-36 2. -√-625
88. ### trig

If each leg has length 5 meters, what are the lengths of the other leg and the hypotenuse
89. ### Trig

Solve for t algebraically: inverse cos(t) = inverse sin(t). Where do I start?
90. ### Trig

Is a triangle that has sides which measure 8, 15, and 17 a right triangle? Justify your answer, ie,
91. ### trig

sin2piex-cos5piex Is this a sinusoid? No. because 2 pie x and 5 pie x are not the same/equal.?
92. ### math

Trig Identities prove sinx+1 \ 1-sinx = (tanx+secx)^2
93. ### trig

convert 80 degrees into radians 80 deg *2PI rad/360 deg = ?
94. ### Trig

Find the area of ABC if A=56 degrees, b=20ft, and c=12ft. 1/2(20)(12)sin56 1/2(240)sin56 99.5
95. ### Trig

Verify that (secx/sinx)*(cotx/cscx)=cscx is an identity. (x=theta BTW)
96. ### trig

If sinx = -3/5, tan x > 0, sec y = -13/5 and cot y < 0, find the following: a. csc(x + y) b. sec (x - y) How do I get the answers of a. -65/33 b. -65/16 Thank you
97. ### trig - identies

Assume that A and B are in standard position and that sin A = 1/2, cos A >0, tan B = 3/4, and sinB<0 Cos (A-B)
98. ### Trigonometry

Can you please help me solve this trig equation for 0 ≤ x ≤ 2π? 9sin^2(x)-6cos(x)-10=0 Thank you!
99. ### Trig

Rules of Logarithms: Can someone explain how to do: 1) e^(2(ln)(x)) 2) e^(-lnx) I know the rules I just don't understand how they apply.. thanks!
100. ### trig

1/sinx = sinx+cosxcotx it's a proof and I have to make them equal to each other. Please help!