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Trigonometric Identities
Page 2
Questions (1,667)
Prove the following Identities
(1-cos^2X)csc^2X=1
4 answers
asked anonymously
136 views
1-cos (2A)/2sin A+ SIN (2A)= tan (A/2)
I need to verify the identity I have no idea how to do that and I have a test please
1 answer
asked by
Rachel
384 views
prove the identity :
cos3x =4 cos^3x-3cosx
2 answers
asked by
Anonymous
1,102 views
secx/secx-tanx=sec^2x+ secx+tanx
7 answers
asked by
olivia
5,867 views
Reduce (csc^2 x - sec^2 X) to an expression containing only tan x.
(is this correct?) csc x = 1/sin x sec x = 1/cos x tan x =
3 answers
asked by
Anonymous
1,078 views
cosx/secx+sinx/cscx=sec^2x-tan^2x
6 answers
asked by
olivia
651 views
Prove
cotx-1/cotx+1=1-sin2x/cos2x
3 answers
asked by
monic
897 views
Prove that the average of the numbers n sin (n degrees) (n = 2, 4, 6, ... 180) is cot (1 degree)
Hint: Express everything in
2 answers
asked by
Sam
1,153 views
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
2 answers
asked by
Anonymous
482 views
tanx = -3/4. x€ 2nd quadrant find sin (x/2), cos(x/2), tan(x/2)
1 answer
asked by
Abhijeet
315 views
Let x, y, and z be real numbers such that cos(x) + cos(y) + cos(z) = sin(x) + sin(y) + sin(z) = 0.
Prove that cos(2x) + cos(2y) +
4 answers
asked by
Pip
735 views
Cos^2(theta)-3csc(theta)+2 divided by csc(theta)-1
5 answers
asked by
Kitkat
375 views
Prove This trig identity cos/1-tan +Sin/1-cot = Sin +Cos
2 answers
asked anonymously
100 views
If tan x =5/12,0 degrees < x < 90 degrees.evaluate,without using mathematical tables or calculator, sin X/(sin X)^2 + cos x
2 answers
asked anonymously
132 views
Prove that cosec²x(tan²x-sin²x)=tan²x
2 answers
asked anonymously
102 views
cotx = -3/5,-pi/2<x<0
Use identities to find the exact value for the remaining five trigonometric functions
4 answers
asked by
qwerty
92 views
cotx=-3/5,-pi/2<x<0
Use identities to find the exact values for the remaining five trigonometric functions
2 answers
asked by
mathisfun
82 views
Prove the identity cot x + tan x = sec x cosec x
2 answers
asked by
James
114 views
17. The expression
2 tan 𝜗 1− tan2 𝜗 is identically equal to A. cos 2𝜃 B. sin 2𝜃 C. tan 2𝜃 D. cot 2�
2 answers
asked by
Benny
125 views
17. The expression
2 tan 𝜗 1− tan2 𝜗 is identically equal to A. cos 2𝜃 B. sin 2𝜃 C. tan 2𝜃 D. cot 2𝜃
4 answers
asked by
Benny
111 views
Given that sin(𝐴 + 𝐵) = sin 𝐴 cos𝐵 +
cos 𝐴 sin𝐵, find the value of sin 105 °. A. √42 (√3 + 1) B. √42
2 answers
asked by
Benny
60 views
Given that sin(𝐴 + 𝐵) = sin 𝐴 cos𝐵 +
cos 𝐴 sin𝐵, find the value of sin 105 °. A. √42 (√3 + 1) B. √42
11 answers
asked by
Benny
74 views
Show that (1+ tanθ) divided (1+ cotθ)= tan θ
4 answers
asked by
chants
106 views
Show that tanθ + cotθ = 2 Cosec2θ
4 answers
asked by
chants
106 views
Prove each of the following iden tities . A. (1-sin theater)(1+sin theater)/sin square theater= cot square theater. B.sin
2 answers
asked anonymously
114 views
There are two questions of my homework I'm having trouble with.. I think we are supposed to show how they are true. In other
3 answers
asked by
Laken
1,158 views
Simplify (sin^2)*(67.5deg) - (cos^2)*(67.5deg) and then evaluate exactly.
5 answers
asked by
Max
480 views
Verify/prove that:
sinAcosA/1-cosA = sin^2/tanA-sinA
2 answers
asked by
Kid
560 views
(o) (1 + sinα – cosα)2 + (1 – sinα + cosα)2 = 4(1 – sinα . cosα)
2 answers
asked anonymously
39 views
(o(1 + sinα – cosα)^2 + (1 – sinα + cosα)^2 = 4(1 – sinα . cosα)
2 answers
asked anonymously
32 views
If tanθ=5/12 and cotϕ=11/13 , with θ and ϕ in the first quadrant, find the exact value of sin(θ−ϕ). Note: Be sure to
2 answers
asked anonymously
132 views
Which of the following is equal to sin(270-x)?
A. -tan(x) B. 1-tan(x) C. -cos(x) D. 1+cos(x) E. 1+sin(x)
4 answers
asked by
Java
1,593 views
prove the identity
(sinX)^6 +(cosX)^6= 1 - 3(sinX)^2 (cosX)^2 sinX^6= sinx^2 ^3 = (1-cosX^2)^3 = (1-2CosX^2 + cos^4) (1-cosX^2)
1 answer
asked by
JungJung
803 views
How do you express sin4x as a trigonometric funcition of x using the identities? I think that you are supposed to start with the
4 answers
asked by
Taylor
2,380 views
Which value for theta is a counterexample to sin^2 theta + cos^2 theta=tan^2 theta as an identity?
a) 5pi/4 b) sin^2 theta +
4 answers
asked by
Genevieve
74 views
Which of the following values for x is a counterexample to the claim that cot(pi/2-x)=tan x is an identity?
Question options: a)
4 answers
asked by
Strahinja
132 views
I need to prove that the following is true. Thanks
(cosx / 1-sinx ) = ( 1+sinx / cosx ) I recall this question causing all kinds
1 answer
asked by
abdo
877 views
Trigonometric Identities
Prove: (tanx + secx -1)/(tanx - secx + 1)= tanx + secx My work so far: (sinx/cosx + 1/cosx +
1 answer
asked by
Dave
1,335 views
Posted by hayden on Monday, February 23, 2009 at 4:05pm.
sin^6 x + cos^6 x=1 - (3/4)sin^2 2x work on one side only! Responses
4 answers
asked by
hayden
1,647 views
Find the exact value of sin(x-y) if sinx=-3/5 in Quadrant III and cosy=5/13 in Quadrant I.
4 answers
asked by
Jennifer
3,834 views
Verify the trigonometric identity:
[(1–sin²x)/sin²x]–[(csc²x–1)/cos²x]= -tan²x I still can't figure this out.
4 answers
asked by
Matt
1,205 views
Prove that:(cos40-sin30)/sin60-cos50=tan50
5 answers
asked by
Rabinprakash
5,156 views
Prove: 1+(TanA/SinB)^2/1+(TanA/SinC)^2 = 1+(SinA/TanB)^2/1+(SinA/TanC)^2
6 answers
asked by
Rabin
3,452 views
Angle x is in the first quadrant and angle y is in the second quadrant, such that Cosx = 12/13 and Siny = 7/25. Determine an
4 answers
asked by
Gabriel
1,422 views
If sin(x) = 1/3 and sec(y) = 5/4, where x and y lie between 0 and π/2, evaluate sin(x + y).
3 answers
asked by
Cassy
3,123 views
Prove that sin 13pi/3.sin 8pi/3+cos 2pi/3.sin 5pi /6=1/2.
4 answers
asked by
Latasha.
3,500 views
If
sin(x) = 1/3 and sec(y) = 29/21 , where x and y lie between 0 and π/2, evaluate the expression using trigonometric
4 answers
asked by
AJ
4,525 views
prove: tan10+tan70+tan100=tan10.tan70.tan100
5 answers
asked by
Rabinprakash Dahal
3,303 views
How do I do this
Need details solution to follow up prove that
12 answers
asked by
Isaac
563 views
Take the following out of fraction form tan^2x/cscx+1
5 answers
asked by
Cathy
2,794 views
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Parent Categories (14)
Algebra
Algebraic Simplification
Basic Trigonometric Functions
Calculus
Cosine and Sine
Functions
Functions and Formulas
Mathematics
Simplifying expressions
Tangent
Tangent Function
Trigonometric Equations
Trigonometric Functions
Trigonometry