prove that the following are identity 1. (cotA+cosecA-1)/(cotA-cosecA+1)=cosecA+cotA 2. (sinA-cosA+1)/(sinA+cosA-1)= 1/(secA-tanA)

5,075 results
  1. maths

    Prove SinA/1-CosA = CosecA + CotA

  2. Trigonometry

    If sinA + sinB = a and cosA + cosB = b, find the value of tanA-B/2

  3. maths

    Prove that [1+cotA-CosecA] [1+tanA+secA] = 2

  4. Math

    prove that sinA/(1+cosA) + (1+cosA)/(sinA) = 2cosecA

  5. Maths

    Prove sqrt(Sec^2 A+Cosec^2 A)=TanA+CotA

  6. Maths

    Given that sinA=2/5 and that A is obtuse,find the value of cosA. 👍 0 👎 0 👁 25 asked by Raj yesterday at 4:18am sinA = 2/5, so cosA = √21/5 But A is in QII, so cosA = -√21/5 👍 0 👎 0 posted by oobleck yesterday at 6:51am Why not

  7. maths

    sinA+cosA=p and secA+CosecA=q then show that q[p^2-1]=2p

  8. Maths

    Express cosA in terms of cotA

  9. maths

    if sinA+cosA=1/5, then a value of tanA/2 satisfies which of the equation? a. 2x^2-x-1 b.x^2-2x-3=0 c.2x^2-5x-3=0 d. 2x^3-7x^2+2x+3=0

  10. Maths

    Cos^2A/sinA-cosecA+sinA=0 Prove lHS =RHS

  11. maths

    If cosA + sinA= root2 cosA Show that cosA - sinA= root2 sinA

  12. Maths

    If sina+7sinb=4 (sinc+2sind) and cosa+7cosb=4 (cosc+2cosd), how do I prove that 2cos(a-d) =7cos(b-c)?

  13. Math

    Prove that. (1+sec2A) (1+sec4A) (1+sec8A)=Tan8A×CotA

  14. maths(trigonometry)

    prove that sinA-cosA+1/sinA+cosA-1=1/secA-tanA

  15. further mathematics

    Let P=(cosA sinA) (sinA cosA) Q=(cosB sinA) (sinB cosA) show that PQ=(cosA(A-B) sin(A B)) (sinA(A B) cos(A-B))

  16. trigonometry

    Prove : 1 + Sin2A/ Cos2A = CosA + SinA / CosA- SinA

  17. trig

    establish the identity: cot(A-B)= cotAcotB+1/cotB-cotA thanks for any help at all

  18. math

    sinA+cosA=p ,secA+cosecA=q (cosA)^2/[2-2(sinA)^2-(cosecA)^2]=p^2/(2(p^2)-q^2

  19. Math

    Hello I am having trouble with proving this: sinA/secA+secA/cscA = tan(A)(2-sin^2(A)) So far I've gotten SinA/(1/cosA) + (1/cosA)/(1/sinA) SinACosA + sinA/cosA I am stuck here, not even sure if multiplying by the reciprocal was the right step..

  20. math

    4m=cotA(1+SinA), 4n=cotA(1-SinA) Proved that (m2-n2)=mn

  21. maths

    tanA+4cotA=4 find the value of tanA*tanA+cotA*cotA

  22. math

    If sina+7sinb=4 (sinc+2sind) and cosa+7cosb=4 (cosc+2cosd), how do I prove that 2cos(a-d) =7cos(b-c)?

  23. trig

    if 8 tan Q=15 then sinA-cosA=?

  24. Math

    Match each ratio in the first row with an equivalent ratio from the second row if angle A plus angle B = 90 degrees. SinA CosA TanA CscA SecA CotA SinB CosB TanB CscB SecB CotB Pleaseeee help!!

  25. trigonometry

    if secA-tanA =10 than sinA =?,cosA =?,secA =?

  26. maths trignometry

    Prove that. √seca+2sina/seca-2sina=Sina+cosa/sina-cosa

  27. Math

    Prove that (cos2A)÷ ( 1+sin2A) = (cotA -1) ÷ (cotA +1)

  28. maths Pls help trig

    1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate 50sin(2A +B) 2.1Prove that sin2A+2cosA-2cos^3A/1+sinA =sin2A 2.2 for which values of A in the interval[-360;360] is the identity in 2.1 undefined? 3.If tanB=3/4 , 0

  29. math (trig)

    i have some problems doing trig the first one is: Show that cos(x/2) sin(3x/2) = ½(sinx + sin2x) i know that you are supposed to substitute all those trig function things in it but i kind of forgot how to the only that i can see substituting in is the

  30. Trig

    Draw a picture and show all work. Given sinA=4/5 and cosA

  31. Precal

    How do i prove that left side equals right? Cot(A+B)=cotAcotB-1/(cotA + cotB)

  32. Math

    A=5 sec(A)/1-4sinA.sinA +cosecA/4cosA.cosA-1 find value

  33. Maths

    Prove that [sinA/(1-cosA)-(1-cosA)/sinA]*[cosA/(1+sinA)+(1+sinA)/cosA]=4cosecA I the second part as 2 secA

  34. trig

    express the trig. ratios sinA,secA n tanA in terms of cotA.

  35. trigonometry

    x×sin^3A=y , cos^3A = sinA × cosA , x×sinA= y×cosA , then prove that x^2+ y^2= 1 I have no idea

  36. math

    12. IF 1/SinA+1/CosA=1/SinB+1/CosB ,PROVE THAT: Cot{(A+B)/2}=TanA.TanB

  37. math

    prove that 1-tan 4 A by1+tan 4 A =cosA + sinA by cosA - sinA

  38. algebra

    i have a problem in dis sum from complex numbers prove that (1+sinA+icosA)/(1-sinA-icosA)=i(secA+tanA)

  39. Trigonometric Identities

    Verify/prove that: (cotA+cotB)/(tanA+tanB)+(1-cotAcotB)/(1-tanAtanB) = 0

  40. maths

    If a cosA - b sinA = c . Prove that a sinA + b cosA = _+√a^2 + b^2 - c^2

  41. Geometry

    In a right triangle if sinA=6/7 and cosA=4/7 what is tanA=

  42. Maths, Divine International Public School

    If 15Cot=8, find (1+SinA)(1-SinA)/(1+CosA)(1-CosA)

  43. math

    how do you solve this.prove: cos2A plus cosA divided by sin2A minus sinA equal to cos2A plus 1 divided by sinA

  44. mathematics trignometry

    prove that the following are identity 1. (cotA+cosecA-1)/(cotA-cosecA+1)=cosecA+cotA 2. (sinA-cosA+1)/(sinA+cosA-1)= 1/(secA-tanA)

  45. math

    Prove the identity tanA/secA+1 + cotA/cosecA+1=cosecA+secA -secAtanA

  46. trig

    prove that :cosA-sinA+1/cosA+sinA-1=cosecA+cotA

  47. Math

    If secB=x,tanB=y(cosecA-cotA)=4/3,sinA+cosA=?

  48. Trigonometric Identities

    Verify/prove the following: (sinA+tanA)/(1+secA) = sinA ______________________________ tanu = 1+sinu-cos^2u/cosu(1+sinu) __________________________________ cotu = (2+cscu/secu)-2cosu ______________________________ tanAsinA/tanA+sinA = tanA-sinA/tanAsinA

  49. trig

    Establish the following identity: CosA/1-TanA + SinA/1-CotA = CosA-SinA

  50. Math

    (secA-cosecA)(1+tanA+cotA)= tanAsecA-cotAcosecA

  51. math

    sinA+cosA=p ,secA+cosecA=q (cosA)^2/[2-2(sinA)^2-(cosecA)^2]=p^2/(2(p^2)-q^2

  52. Maths

    Hi, can someone give me the answer to this question: secA-tanA=1/4. Find cosA I got: CosA=4(1-sinA) Is my answer good? Now multply each side by (1+sinA) CosA(1+sinA)=4 cos^2 A CosA=1/4 (1+sinA) 16(1-sinA)=1+sinA 15=17SinA So you have sinA, now find Cos A

  53. math

    if tanA=root2-1, prove that (secA.sinA tan squareA-cosecA) =(12-¡Ì5)/2

  54. physics

    the velocity ratio of an inclined plane whose angle is a I a). VR=1/sinA b). VR=1/tanA c). VR=1/cosA d). VR=1/cotA?

  55. Maths

    TanA=√2-1 then find secA.sinA+tan^2A-cosecA

  56. Trig

    Please help with this one. I've worked it out in so many ways and can't tell what's correct. sinA sinA ----- - ------ 1+sinA 1-sinA Which answer is correct for the problem above? a) 1+cotA b) sinA tanA c) -2tan^2A d) secA cscA common denominator: 1-sin^2 A

  57. trig

    Match each ratio in the first row with an equivalent ratio from the second row if angle A plus angle B = 90 degrees. SinA CosA TanA CscA SecA CotA SinB CosB TanB CscB SecB CotB Does this question even make sense?

  58. Math

    CosA/1+sinA=1-sinA/cosA I have to prove the identity each side has to b the same how would i do that? I have a unit test on monday so im doing practice questions

  59. Maths trigonometry

    Prove that cosec A_cotA by cosecA+Costa + cosecA+ Cot A by cosecA_cotA=2 cosec squareA_1=2×1+cos squares by1_cos squareA

  60. MathS triG

    1 .If tanA=1/3 and tanB=1/7 (both A and B are acute),calculate 50sin(2A +B) 2.1Prove that sin2A+2cosA-2cos^3A/1+sinA =sin2A 2.2 for which values of A in the interval[-360;360] is the identity in 2.1 undefined? 3.If tanB=3/4 , 0

  61. trig

    if 5cos A plus 3=0 and 180

  62. Trigonometric Identities

    Verify/prove that: sinAcosA/1-cosA = sin^2/tanA-sinA

  63. Math

    If 1/sinA+1/cosA =1/sinB+1/cosB, prove that: cot(A/2+B/2) = TanA. TanB

  64. Math2

    IF (1/SinA)+(1/cosA)= (1/sinB)+(1/cosB) Prove that cot((A+B)/2)=tanA tanB Please helppppppppppp

  65. maths

    tanA/secA-1 + tanA/secA+1 = 2 cosecA

  66. trig

    Prove : (sinA-cosA+1)/(sinA+cosA-1) = (1+sinA)/cosA

  67. math

    Prove: tanA+2tan2A+4tan4A+8cot8A=cotA

  68. Tc Maths

    Prove: TanA+2Tan2A+4Tan4A+8Cot8A=CotA

  69. math urgent

    Prove: TanA+2Tan2A+4Tan4A+8Cot8A=CotA

  70. trig

    Prove: 1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA

  71. trig

    Prove: 1/cos2A+sin2A/cos2A=sinA+cosA/cosA-sinA

  72. trig

    I need to count this: a) 1-tg^2a/1+ctg^2a, when sina =2/3 b) 1-tg^2a/1-ctg^2a, when cosa= -1/3 c) tga * cos^2a, when sina + cosa=5/7 d) tg^2a + 1/sina * 1/cosa + ctg^2a, when tga + ctga =5

  73. Math

    If 1-cosA=5/13, prove that 25sinA(sinA - cosA)

  74. Trigonometry

    I need to prove that the following is true. Thanks. csc^2(A/2)=2secA/secA-1 Right Side=(2/cosA)/(1/cosA - 1) = (2/cosA)/[(1-cosA)/cosA] =2/cosA x (cosA)/(1-cosA) =2/(1-cosA) now recall cos 2X = cos^2 X - sin^2 X and we could say cos A = cos^2 A/2 - sin^2

  75. Math

    Find angle A if it is greater than or equal to 0 degrees and smaller than or equal to 180 degrees. round to the nearest tenth of a degree, if necessary. a) sinA = 0.5 b) cosA = -0.5 e) cosA = 0.4561 g) sinA = 0.5736 PLEASE HELP WID THIS!!:( i tried so

  76. mathematics trignometry

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

  77. trig

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

  78. trig

    determine wheather each of the following is an identity or not prove it 1. cos^2a+sec^2a=2+sina 2. cot^2a+cosa=sin^2a

  79. math

    SinA➖cosA/sinA➕cosA➕sinA➕cosA/sinA➖cosA=-2/cos2A

  80. Math

    If sinA+sinB=1/2 and cosA+cosB=1/2 then the value of tanA+tanB

  81. Trig

    I don't know the physics behind Snell's Law, but I can do the math Snell's Law says sin(angle of incidence)/sin(angle of reflection) = refractive index since you know the two angles... sin45/sin27 = refractive index =1.5575365 so for an angle of refection

  82. trig

    Please help me how to do this: 1) 1 + sina*cosa / (cosa + sina)^2 = 2) sina + cosa / 1- 2sin^2a =

  83. Trig

    Draw a picture and show all work. Given cosA=3/10 and tanA

  84. Trig

    prove that tanA divided by the sinA equals the secA

  85. trigonometry

    express secA in terms of cotA? can you pleas say how to solve this??

  86. Maths

    Prove: 1+(TanA/SinB)^2/1+(TanA/SinC)^2 = 1+(SinA/TanB)^2/1+(SinA/TanC)^2

  87. maths

    1-cosA+sinA DIVIDED BY 1+cosA+sinA

  88. Trigonomentry help!!!

    SinA+ cosA=17/3 find sinA-cosA

  89. Math trigonometry

    Prove sinA/1+cosA =tan1/2A

  90. algebra

    prove that cosA/1-sinA=2cosecA

  91. trig

    How to do this one? (sina/1-cosa) + (1-cosa/sina) = Also, wanted to ask if I did another one right: 1 - sin^2a + tg^2a * cos^2a = 1 - sin^2a + (sina/cosa)^2 * cos^2a = 1 - sin^2a + sin^2a = 1 ???

  92. math

    Sina+cosa=root over cosA

  93. math

    Sina+cosa=root over cosA

  94. trig

    If (cosa-sina)/sina = 2 , then what is tga = ?

  95. Math

    Hello! I have been learning about proving identities and can do simple ones but lately I have been really struggling. I am currently stuck on this problem. cos(A-B)/tan(A)+cot(B) = sin(B)/sec(A) I managed to get to: cosAcosB-sinAsinB/(sinA/cosA) +

  96. math

    (secA+tanA)(1-sinA)

  97. further Mathematics

    Let A=(cosA -sinA) (sinA cosA) show that A^2=(cos2A sin2A) (sin2A cos2A)

  98. trig

    SinA =0.5 cosA=?

  99. math

    sinA=.....+cosA

  100. math

    sinA=.....+cosA

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