# Trig check my work please?

90,347 results, page 34

1. ### Math 116 algebra please check

Solve by elimination method 2x + 3y =1 4x + 6y =2 What is the solution of the system N there is no solution

Solve w= (va)/(r^2+a^2) for a. I applied the quadratic formula a= (v/w +- sqrt (v^2/w^2 - 4*(-wr^2)) /2 and I have the answer as a= (v+/- sqrt[v^2+4w^2r^2]/w
3. ### *Science-Check*-Help

Can someone please have a moment to look at my other previous science posts, thanks :-)

in which one quadrant is the cosecant negative and the secant positive. Quadrant 4. Is this correct?
5. ### algebra

What is the volume of a box whose length is 12-2x, width is 7-2x, and height is x. l*w*=height 12*7=84 2x=84 x=42 Is this right, check for me please
6. ### algebra

The problem is factoring completely 4xX^2-20x-24 4(X^2-5x-60 4(x-6)(x+1) 12x^2-75 3(X^2-25)=3(X-25)(x+3) Can someone check these problem for me please.
7. ### Algebra, ( Check please)

5h-7=2(h+1) I got, 5h-7=2h+1 and then I added -7 plus 1, and got -6 So 5h-6=2h? Could someone explain what I did wrong and help me correct it?

(0.80M)(5.00mL) = c2 (75.00mL) c2 = 5.33e-2 M Is the correct amount of sig figs?
9. ### Art

Can you please check these two sentences? Thank you. 1) Why did the doctor prescribe Coleridge opium? What did Coleridge suffer from?
10. ### AP calculus

∫[0,x^(3),(t)/√(1+t^(3)),] Find the derivative of the integral. A. (3(x^3))/((1+(x^9))^0.5) B. (x^3)/((1+x^9)^0.5) C. (3x^3)/((1+x^3)^0.5) D. (5x^3)/((1+x^6)^0.5) E. (3x^5)/((1+x^3)^0.5) I think the answer is A. Can you check my answer please?

The complement of an angle measures 37°. What is the measure of the angle? A- 143° B- 127° C- 63° D- 53° My choice is C.
12. ### Math

Can someone please check these problems? Thank you! Solve each equation for the indicated value. 1. a-b=-c, for a I got a=-c+b 2. 4y+6x=12, for y I got y=-3/2x+3
13. ### Math

Find the slope of a line that is parallel to the line ontaining the points (3, 4) and 2, 6) A. m= 2 B. m= -2 C. m= -1/2 D. m= -1 I say it's C or A Please check
14. ### Math

Find the slope of a line that is parallel to the line ontaining the points (3, 4) and 2, 6) A. m= 2 B. m= -2 C. m= -1/2 D. m= -1 I say it's C Please check
15. ### Math

what is 10 thirds in standard form? A.10 B.100 (my answer) C.1,000 D.1,0000 Please check my answer!!
16. ### Math: Trig

Help with vectors, please. Thanks 1) Express point in rectangular form. Give EXACT answer, if possible? (2, 4π /11) 2) Given P = (2. -3) and Q = (-3, -4). find the component form of vector PQ 3) The vector v has a magnitude of 25 inches and a direction of 32° , Express ...

50% of what number is 45? I did 45*.50=22.5 is that the correct answer?
18. ### French

Sra could you please check my french post again.
19. ### math

please check: 10 to the 1st power = 10*1??? 10 to the 0 power = 10*0??? I'm not sure.
20. ### math

Simplify. 3w - 10w MY ANSWER: -7w
22. ### Math

Please check my answer. Multiply the reciprocal of 4 1/2 by 8/9. My answer: 9/2 x 8/9 2/9 x 8/9 = 16/81
23. ### Math

3. 8 1/3 x 3/5= 25/3 x 3/5=75/15=2 4. 2 5/8 x 1 2/3 21/8 x 5/3=105/24 105/24=4 9/24 Can you please check the above answers.
24. ### Math

5 1/2 x 3 1/3= 11/2 x 10/3= 110/6 110/6=18 2/6 Please double check the answer thank you
25. ### Math

7 1/5x 2 1/6= 36/5 x 13/6=468/30 468/30= 15 6/30 Can you please check on the answer and the above.
26. ### English

Could you please check these two sentences, please? 1) Water chute and spring board don't have the same meaning, but I think I can use them both with "dive into the water". 2) Superman was both a superhero endowed with superpowers and a shy and insecure newspaper reporter. He ...
27. ### Trig

Solve: x=Arctan(-sqrt3).
28. ### trig

1-tan^2x/ 1-cot^2x = 1-sec^2 x
29. ### trig

what is the rectangular equation for r=12/(3-6cosX).
30. ### trig

find the value of : sin18'
31. ### trig

what is the inverse tangent of (rad3/3)?
32. ### Trig

cos2x(2cosx+1)=0 Solve for x.
33. ### trig

solve for C0T^2X - CSC^2X =?
34. ### Math-Trig

solve for a: V=4/3pia^2b
35. ### trig

The period of y=5 cos pi x is 2 but I don't know how to find it.

37. ### trig

how do you graph y=55-4csc(theta+5)???
38. ### Trig

How do you do this problem? 1+i(square root of 3)
39. ### trig

Determine the amplitude of: y=cos x
40. ### Trig

What is the solution set of the inequality x^2-x>20? a)x>5 b)-4<x<5 c)x>5 or x<-4 d)x>0
41. ### trig

how do you graph the equation y=-2cosx?
42. ### trig 30

What is the period of the function y =sin x/4?
43. ### trig

Evaluate cos (2 arcsin (1/4))
44. ### trig

what is the tan of 25 degrees and 01 minute
45. ### Trig

tan(2x)=root3 over 3
46. ### Trig

Solve for X: 5sinx+2cos2x-3=0
47. ### trig

cosxcscx-2cosx=cscx-2
48. ### trig

cos(x+B)=cosxcosB-sinxsinB
49. ### Trig

How do I solve this problem? tan (30° + x)
50. ### equations trig

2cos^2x-3sinx=0
51. ### equation trig

cosx-sinx<1/2
52. ### Math (trig)

4cos(x)+5=6sec(x)
53. ### HELPPPPPPP (TRIG)

4cos(x) 5=6sec(x)
54. ### trig

Prove tanAsin2A=2sin^2a
55. ### trig

What is the angle B? Given that A=46 degree b=4 c=8
56. ### trig

cotxcot2x-cot2xcot3x-cot3xcotx=1
57. ### trig

25q to the second power -81=0
58. ### trig

What is the graph of y = 3 sin (3x + 180)?
59. ### trig

if 8 tan Q=15 then sinA-cosA=?
60. ### trig

cotx/secx-tanx
61. ### Alg & Trig 2

find the sum of 1/2, 2/7x, and 5/x
62. ### Alg & Trig 2

find the sum of 1/2, 2/7x, and 5/x
63. ### trig

solving radical equations... help! 5+¡în+1= n+4
64. ### trig

sinx+cosxcot=csc
65. ### trig

how do you explain y=2 cos(1 half x)
66. ### Trig

Are 120 and -240 coterminal?
67. ### algebra/trig

solve: ln12x = 6
68. ### Trig

What is the phase shift of y=6cos(6x+pi/2)?
69. ### trig

Show that (90-45)=cos90 cos 45
70. ### trig

What is the trigonometric notation for 3-3(sqrt3i)?
71. ### trig

what is the cube root of (-64i)?
72. ### Trig

What is the vertical asymptote of y=tan(x-pi/3)?
73. ### Trig

What is the period of f(x)= 1/2 tan(3x+pi/2) and -2/3 cos(x/3-1/2)?
74. ### trig

How would you go about finding x and y?? [x-8 2 2y] [9x-16 2 6] [ 2 -7x 7] = [ 2 -7 7] [-4 y-4 2] [-4 -1 2]
75. ### trig

sec(90degrees -theta)
76. ### trig

verifying a solution. 4cos^2 2x-2=0
77. ### trig

find cos (x/2) when sint =12/13
78. ### Trig

Find [4(cos115+isin115)]^6
79. ### trig

If z=1+i, then the multiplicative inverse of z esqaire is:
80. ### Trig

cos270degrees -5cos180degrees (0/1)-5(-1/1) 0-5(-1) does it equal -5 or +5?
81. ### trig

how would i graph 3sec(x + (pi/2))
82. ### trig

2x+5y+3=0 what is the value of sin theta
83. ### trig

how do you factor completely.. 18x^2+3x-3?
84. ### trig

Triangle PQR is congruent to P'Q'R. If PQ= x+y, P'Q'+10, Q'R'= 3x-y, and QR=14, then what is x and y?
85. ### trig

Find value of tan75/2
86. ### trig

CosA*Cos17=1 then determine A
87. ### trig

How do you evaluate the expression cos3pi
88. ### Trig - Thanks Damon and Lindsey

Thanks a bunch
89. ### trig

prove that tan^2x+ sec^2x =1
90. ### trig

express 4/5-ã13 plz
91. ### trig

express 4/5-ã13 plz
92. ### trig

what is the amplitude of y=2+cos(-1/2 theta)?
93. ### trig

3x^2+16y^2=48 conic sections
94. ### 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?
95. ### trig

Give the reciprocal of the following. 7/15
96. ### trig

Find sec^2 x (4 tan^2 x-3)
97. ### trig

sin2x=cos3x then sinx=?(if 0<x<pi/2)
98. ### trig

If A=55 degrees 55 minutes and c=16, find a.
99. ### trig

Tan(cos inverse 5x)
100. ### trig

if cot(x-10)=tan(4x) what does x equal?