256 Answered Questions for the topic trigonometric identities
Trigonometric Identities Trigonometry
02/09/20
Express the following in terms of sinx
1). cosx (2cosx - 3tanx)I need to use one or both of the following equations as these are the only ones we have been taught so far: i). cos2x + sin2x = 1ii). tanx = sinx / cosx
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12/04/19
Given Cos (2x)= -24/25, 2nd Quadrant (pi/2 <x< pi); What is Sin(x) ?
Am I missing something big here? I've gotten around to making sin(2x)=7/25 but I don't understand how to go from double angle to single angle using identities.
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12/26/18
cos3x = 1- 3cosx Solve for x
what I did:cos(2x + x) = 1-3cosxused compound angle formulacos2xcosx - sin2xsinx = 1- 3cosxused double angle formulae for both cos2x and sin2x(1-2sin^2x)cosx - 2sin^2xcosx = 1-3cosxbut I'm stuck...
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09/30/18
Prove that cos(x)tan(x) divided by cosec(x)^2 equals cos(x)^3 divided by cot(x)^3
Prove that cos(x)tan(x) / cosec(x^2) = cos(x)^3 / cot(x)^3
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Trigonometric Identities Trigonometry
09/15/18
trigonometric identities
prove that cos(90°-θ)/tan(180°+θ)=cos(360°-θ)
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Trigonometric Identities
08/03/18
Proof of trigonometric identity
(1-cos^2x)/tan^2x=cos^2x
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Trigonometric Identities Trigonometric Functions
07/16/18
fiind all solutions at interval [0,2pi] sin^2x - cos^2x = 0
find all the solutions at the interval [0,2pi] for the equation sin^2 x - cos^2 x = 0
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Trigonometric Identities
07/15/18
(sin x + sin 3x + sin 5x )/ (cos x + cos 3x + cos 5x) = tan 3x
how do you prove this identity (using a level maths)
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07/14/18
Suppose the θ is an acute angle and cosθ = 4/5. Using the results sin2x = 1/2*(1 - cos2x) and cos2x = 1/2*(1 + cos2x), find the exact values of cos1/2θ, sin1
Suppose the θ is an acute angle and cosθ = 4/5.
Using the results sin2x = 1/2*(1 - cos2x) and cos2x = 1/2*(1 + cos2x),
find the exact values of cos1/2θ, sin1/2θ, and tan1/2θ
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06/27/18
The trigonometric ratio of 13pi/3 are same as that of?
pi/3, pi, pi/6 or 11pi/3??
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06/07/18
Points of discountuity
how do we find pointa of discountity of trignometric functions such as
tan^-1(5x)
or sec(5x)
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Trigonometric Identities Parametric Equations
05/22/18
How to simplify trigonometric equations? (See details below)
Here is the question I'm stuck on:
The motion of point P is given by the following equations:
x(t) = -2 sin (t) cos (t)
y(t) = cos (2t)
The path traced by point p is called curve...
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Trigonometric Identities
05/16/18
Verify the identity. sin quantity x plus pi divided by two = cos x
Precalculus
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Trigonometric Identities
05/16/18
Verify the identity. cotangent of x to the second power divided by quantity cosecant of x plus one equals quantity one minus sine of x divided by sine of x
Precalculus
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Trigonometric Identities
05/16/18
Verify the identity. 4 csc 2x = 2 csc2x tan x
Precalculus
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Trigonometric Identities
05/16/18
Cos theta = -4/9 with theta in quadrant 2, find sin theta
I don’t know the answer .
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Trigonometric Identities
05/15/18
solve and put in a trig equation
25 cos(2t)+12 sin(t+π/2)+2 cos^2(t)
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Trigonometric Identities
05/14/18
verify the identity cot(x-pi/2)=-tanx
precalculus
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Trigonometric Identities
05/14/18
How to simplify trigonometric equations? (see details of question!)
This is the questions I'm stuck on:
Solve algebraically: f(x) = g(x) when f(x) = 4sin(2x)cos(2x)+2 and g(x)= 4sin(3x)sin(2x) + 2
1. I equated the equations
4 sin(2x)cos(2x)+2...
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Trigonometric Identities
05/04/18
If y=sin 0, what is sec 0 in terms of y?
Math question
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Trigonometric Identities Trigonometry
05/01/18
Very the identity
cos(x-y) / sin(x)sin(y) = cot(x)cot(y)+1
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04/24/18
How to find coordinates on terminal arm
The angle theta is in the first quadrant and sin of theta = 2/sqrt(13)
determine the possible coordinates for point P on the terminal arm
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Trigonometric Identities Trig Functions
04/15/18
if sin of A = 5/13, in quad 1, find tan A/2 and a few others
if sin of A = 5/13, in quad 1, find tan A/2
if cos of A = -4/5, in quad 2, find sin A/2
if cos A =-4/5 in quad 2, find cos A/2
if cos A - -4/5 in quad 2 find cos 2A
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04/13/18
State the amplitude and period of this function: y = -3cos(pi/3)x.
State the amplitude and period of this function: y = -3cos(pi/3)x.
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Trigonometric Identities
04/13/18
State the amplitude and period of this function: y = 4sin(1/2)x
State the amplitude and period of this function: y = 4sin(1/2)x
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