is x=15 degrees a solution of radical 3/3 cos2x+sin2x=0
39,728 results
Trigonometry
find sin2x, cos2x, and tan2x if sinx= 2/sqrt 5 and x terminates in quadrant III

Math
Solve the equation sin2x=2cos2x, for 0 degrees

Adv function
Express sec2x in terms of tanx and secx I know you have to sec(2x) = 1/cos(2x) = 1/(cos²x  sin²x) But how do you split that. Like how to simplify that?

Trigonometry
Prove: 1tanx/1+tanx=1sin2x/cos2x

Trigonometry
Simplify the expression using trig identities: 1. (sin4x  cos4x)/(sin2x cos2x) 2. (sinx(cotx)+cosx)/(2cotx)

trigonometry
if sin2x=3sin2y, prove that: 2tan(xy)=tan(x+y) ( here, in sin2x, 2x is an angle., like there's a formula:sin2x=2sinxcosx and sin2y=2sinycosy; ....)

dai so
chung minh dang thuc (1+Sin2x)/Cos2x=Tan(pi/4+x)

trig
sinx = 4/5 and x terminates in Quadrant II Find sin2x and cos2x How to get the answers, which are sin2x = 24/25, cos2x = 7/25?

PreCalculus
Sin5x cos2x + cos5x sin2x=

Math
Solve the equation 2cos2x = √3 for 0°≤x≤360° I did this: cos2x = √3 /2 2x=30 x=15 x=15, 165, 195, 345 Is this correct? Solve the equation √3 sin2x + cos2x = 0 for π≤x≤π No idea how to approach this one Thanks a bunch for the help!

math
angle x lies in the third quadrant and tanx=7/24 determiner an exact value for cos2x determiner an exact value for sin2x

math
Solve sin2x + sin4x = cos2x + cos 4x for x in the interval[0,2pi) Hint: the following substitution should come in handy: sin3x= cos3x . tan3x

Trig
Simplify: (cosx + cos2x + cos3x + cos4x + cos5x + cos6x) / (sinx + sin2x + sin3x + sin4x + sin5x + sin6x) into a single Cotangent function. Using the sumtoproducts, I was able to get remove some of the addition in attempts to get full multiplication, but

algebra
solve the equation or formula for the indicated variable R=ts^2+3 a)s=under radical R3/t (not under radical b)s=everything under radical R3/t c)s=R (under radical)3/t d)s=everything under radical R/t3 Thanks again I feel really stupid not being able to

Math please help quick
Which of the following are identities? Check all that apply. (Points : 2) sin2x = 1  cos2x sin2x  cos2x = 1 tan2x = 1 + sec2x cot2x = csc2x  1 Question 4. 4. Which of the following equations are identities? Check all that apply. (Points : 2) Question 5.

trig
tanx = 5/12 and sinx

MATH
Simplify: Sin2x/1Cos2x

pre calculus
were doing sum and difference identities tan (225 degrees+60 degrees) i got to the part where its 1+radical 3/1radical 3 ..now what?

trigonometry
1tanx/1+tanx=1sin2x/cos2x

trigonometry
Been trying this forever so it says: Simplify 1+sin2x+cos2x/1+sin2xcos2x ive tried this problem so many times I need help with it...

maths
prove that 1+sin2xcos2x / sin2x+cos2x = tanx

math
sin2xcotx = cotxcos2x Using the various trigonometric identities(i.e. double angle formulas, power reducing formulas, half angle formulas, quotient identities, etc.) verify the identity. I first added cotx to both sides to get sin2x = cotxcos2x+cotx

Pre Calculus
Establish the following identity Sin2x/1+cos2x=tanx

Maths
Prove that sin2x+cos2x1/sin2x+cos2x+1=tanx

trig
write sin4xcos2 as the sum or difference of two functions. answers: 1/2(cos6x+cos2x), 1/2(cos2xcos6x), 1/2(sin6x+sin2x), sin6xsin2x

PreCalc/Math
Prove Identity: (1cos2x/ tan x) = sin2x

PreCalculus
Find all solutions to the equation in the interval [0, 2pi) cos4xcos2x=0 So,this is what i've done so far: cos4xcos2x=0 cos2(2x)cos2x (2cos^2(2x)1)(2cos^2(x)1) No idea what to do next.

Calculus
Solve identity, (1sin2x)/cos2x = cos2x/(1+sin2x) I tried starting from the right side, RS: =(cos²xsin²x)/(1+2sinxcosx) =(cos²x(1cos²x))/(1+2sinxcosx) and the right side just goes in circle. May I get a hint to start off?

trig
Verify the trigonometric identity: [(1–sin²x)/sin²x]–[(csc²x–1)/cos²x]= tan²x I still can't figure this out.

CALCULUS
ʃ (4sin²x cos²×/sin2x cos2x)dx PLEASE HELP!!

precalculus
tanx= 12/5 x in quadrant 2 find; sin2x= cos2x= tan2x=

PreCalculus
Verify the following identity: (sin2x)/sin  (cos2x)/cosx=secx

math
Prove the identity: 1cos2x/sin2x = 1+tanx/1+cotx I simplified the RS to tanx. LS:(12cos²x+1)/2sinxcosx (2+2cos²x)/2sinxcosx How do I simplify the rest?

calc
Where do I start to prove this identity: sinx/cosx= 1cos2x/sin2x please help!! Hint: Fractions are evil. Get rid of them. Well, cos2x = cos2x  sin2x, so 1coscx = 1  cos2x  sin2x = 1  cos2x + sin2x You should be able to simplify this to 2*something

Calculus grade 12
solve for (

MATH
Sin2x/1Cos2x

math
what does sin2x/cos2x equal to?

math
d2y/dx2+9y=cos2x+sin2x

trig
secx = 4 in Q2 find sin2x,cos2x,tan2x

Identities
Verify the following identity cos2x/sin2x+sinx/cosx=csc2x

trig identites
since sin2x+√3cos2x=2sin(2x+60) find the general solution for the equation sin2x+√3cosx=0 thank you

calc
sin2x = (radical 3)/ 2 solve each equation on the interval [0,2pi)

radical equation  no solution right?
radical sign (w + 5) = 2 In all my problems there are a letter variable on the end example: radical sign (u + 30) = u I then square both sides, drop the radical sign then (u+6)(u5)=0 then check to see if they are both true I guess my question is this is

Trig
Prove the following functions: (sinx+sin2x)/(1+cosx+cos2x)=tan x (cos3x/sinx)+(sin3x/cosx)=2cot2x tan2x=(2/cotxtanx) theses are due in the am. Fastness would be great?

Geometry
1.If two different lines are perpendicular to the same plane, they are: a. Collinear b. Coplanar c. Congruent d. Consecutive I think the answer is B, is that correct? Also, this: 2. Express 3 radical 75 plus radical 27 all over3 in radical form. I

Math
Find the domain of the following functions. 1. y= radical(x3)  radical(x+3) 2. y= [radical(2x9)] / 2x+9 3. y= radical(x^2  5x 14) 4. y= [cubed root(x6)] / [radical(x^2  x  30)] I'm terrible at finding domains.. so any help with these problems would

precalc
is x=15 degrees a solution of radical 3/3 cos2x+sin2x=0

Trigcheck answer
Solve the equation of the interval (0, 2pi) cosx=sinx I squared both sides to get :cos²x=sin²x Then using tri indentites I came up with cos²x=1cos²x Ended up with 2cos²x=1 Would the answer be cos²x=1/2???

trig
write sin4xcos2 as the sum or difference of two functions. answers: 1/2(cos6x+cos2x), 1/2(cos2xcos6x), 1/2(sin6x+sin2x), sin6xsin2x

trig
write sin4xcos2 as the sum or difference of two functions. answers: 1/2(cos6x+cos2x), 1/2(cos2xcos6x), 1/2(sin6x+sin2x), sin6xsin2x

trig
cotx = 2 and 0 less than or equal to x less than or equal to pi Find sin2x and cos2x How to get the answers of sin2x = 4/5, cos2x = 3/5?

trig
Verify the trigonometric identity: [(1–sin²x)/sin²x]–[(csc²x–1)/cos²x]= tan²x I can't figure this out.

math
sin2x − cos2x − tan2x = 2sin2x − 2sin4x − 1/ 1 − sin2x for x = 45

Calculus
Find the derivative of y with respect to x: y=(1+cos²x)^6 y'=6(1+cos²x)^5 How do you derive inside the brackets? The answer says sin2x, but wouldn't it be 2sinx, using the chain rule.

Math
prove sin2x+cos2x+1 tan(pi/4+x) ______________ = __________ sin2x+cos2x1 tanx so what I did tan(x) (1+cos(2x)+sin(2x)=tan(pi/4+x) (1+cos(2x)+sin(2x)

precal
find all solutions in interval [0,2pi] tan²x = 3/2 secx This question may look tricky, but its actually quite simple. First: rearrange the pythagorean identity tan²x+1=sin²x so that it reads tan²x=sin²x1 Then replace the tan²x in the original

Mathematical
Sin2x+cos2x

MATH
Simplify: Sin2x/1Cos2x

physics
1)if y=e^x . cot x then dy/dx will be 2) f(x)=sin²xcos²x then the value of f' (π/4)

maths
d2y/dx2+9y=cos2x+sin2x

precalc
How do i verify: cotx = (sin2x)/(1cos2x)

Calculus
How do you find the derivative of f(x)=sin2x/cos2x

Maths
if a=cos2x + sin2x and b=cos2y + isin2y.then find (a + b)

calculus
Solve for x on the interval (0, 2pi] (sin2x + cos2x)^2 = 1

Math
How do you prove this identity? cos2x*tan(π\4x)= 1sin2x

precalc
tanx= 12/5 x in Q 2. find sin2x= cos2x= tan2x=

Math
Required to Prove the following trig identity: (cos2x)^2 + (sin2x)^2 = 1

gr 12. advanced functions
Trig identity Prove: cos2x tan(pie/4  x)  = 1 + sin2x

Trig
help please!: (sinx + sin2x +sin3x) / (cosx + cos2x + cos3x) = tan2x

Algebra
I'm adding 2(radical 50) + 12 (radical 8). I began by breaking the radical fifty into two parts: the radical of 25 and the radical of two. The radical of twenty five can break down into five, and the radical of two stays the way it is. Now it should read 2

Calculus II
How does one obtain cos2x = cos^2(x)  sin^2(x) by differentiating the identity sin2x = 2sinxcosx

Precalculus
Determine the solutions to the equation 2sinx − cos2x = sin2x for 0 ≤ x ≤ 2π . How do I start this question?

Math (Trig)
Rewrite the following expression in terms of tan3x: (sin2x + sin4x)/(cos2x + cos4x)

math , help,algebra
i am up to this point in my problem but i don't know what to do next with it can someone show me. Directions: Simplify by combining like terms x radical(18) minus 3radical(8x^2) these are the steps that i've done so far. = x radical (2*9) 3radical

MATH
veify that each equation is an identity cos2x+tan2xcos2x=1 sin4xcos4x/sin2x=1cot2x

Math
simplify (cos4xcos2x)/(sin4x+sin2x) the answer choices are : cotx, tanx, cotxtanx, or 1

Trigonometry
How do I find all solutions in the interval [0,2Pi): sin2x=cos2x answer choices are: a.)Pi/8 b.) Pi/8, 5Pi/8, 9Pi/8, 13Pi/8

math
I have to find an exact solutions on the interval [0,pi) for both of these problems 1) 2sin2x = sqrtx and 2) 12sqrt2 sinxcosx = 0 I know this much: 1) sin2x = (sqrt x)/2 = 2sinxcosx = (sqrt x)/2 What do I need to do next? 2) 1/(2 sqrt2) = sinxcosx =

Pre calc
Please help me proof the identity. This isn't even math to me, I can not understand it so please show all work. God bless A)1cos2x/sin2x=tanx B) sin4x/sinx=4cosxcos2x

math,correction
Simplify by combining like terms. Problem #32 radical (63)  2 radical (28) + 5 radical (7) My answer: 4radical(7) Problem #50 Find the perimeter of the triangle shown in the figure. leg 1 = radical (5)  radical (3) leg 2= radical (5) + radical (3)

Trigonometry
I can't remember what formula to use for these. Note the X's may be replaced by a theta symbol. I just didn't have one on my keyboard. Use the given information to find sin2X, cos2X and tan2X if 0< X

maths please answer NOW!!!!!
solve algebreically the equation cos2x=1sinx also cosx=cosx1 and please also sin2x=3sinx

Calculus
In the interval (0 is less than or equal to x which is less than or equal to 5), the graphs of y=cos(2x) and y=sin(3x) intersect four times. Let A, B, C, and D be the xcoordinates of these points so that 0

trig
Solve the triginometric equation analytically. Use values of x for 0 less then or equal to x less then 2pi The equation for this question is sin2x + cos2x = 0

trig
on the same set of axes: (0 degrees is greater than or equal to x and x is less than or equal to 360 degrees) (a) sketch the graphs of y= sin degrees ,y=2sinx degrees and y=sin2x degrees

trigonometry
Prove cotx1/cotx+1=1sin2x/cos2x

math,correction
Can somoene helpme plz... Simplify radical 7 * radical 14 wouldn't it be radical (7*14) = radical (98) = 7radical (14) = 7 radical (2) The result is right, you erred on the next to last line. So how do i show that step that i am wrong in...

trig
I keep trying to find the power reducing formula for sin^4(x), but I can't seem to get all the fractional parts correct. The answer I should be getting is: sin^4(x)=(1/8)cos4x(1/2)cos2x+(3/8) I can only get this far knowing feeling confident. When I go

math,correction
Find the area of the rectangle shown in the figure. length = radical (3) + radical (5) width = radical (3) + radical (5) My answer: a= 8 + 2 radical (15) or a = 15.75 agree, you seem to be able to do these should i leave it as the radical form or the

integral Calculus
ʃ (4sin²x cos²×/sin2x cos2x)dx i've got it from the book and it has an answer from the back page of the book but i want to know how to solve it..i really need it for practicing this subject...please please help..Thanks a lot.. the answer is: 1/2

Geometry, help!
Circle O has a radius 28. Radii OM and ON form an angle of 60 degrees. Find MN. A) 28 radical 2 B) 28 C) 56 D) 56 radical 3 Is it A) ?

math
in the question 6radical x +3 radical y 2radical y +3 radical x radical y is the answer 9 radical x +1 radical y. i just don't get it thanks

math
Solve radicals. 1. √8 /√32 (radical 8 divided by radical 32) = √1/√4 (divided numerator & denominator by 4) = 1/2 (simplify radical 1 over radical 4) 2. √7 /√49 (radical 7 divided by radical 49) = √7 /7 (simplified radical 49 = 7, but kept

trig
how does this work? (Sin2x+cos2x+2sin²x)/(sinx+cosx) = (sinx+cosx

Math
prove identity Sin2x  sinx/cosx + cos2x= sinx/cosx + 1

trig
Sketch the graph of f(x)=sin(x+30 degrees) and g(x)=cos2x in the same system of axis [180 degrees;180 degrees]

math,correction,plz
Perform the indicated division. Rationalize the denominator if necessary. Then simplify each radical expression. Problem #54 (6radical(20))/(2) My answer: 3radical(5) Problem #50 Find the area of the rectangle shown in the figure. width = radical (3) +

PreCalculus
Hi, I need a bit of help with verifying identities. The problems are as follows: sinx+cosx/cotx+1=sinx sin2x/sin  cos2x/cosx=secx 1tan^2θ/1+tan^2θ=cos2θ

Precalculus
Please help!!!!!!!!!!! Find all solutions to the equation in the interval [0,2π). 8. cos2x=cosx 10. 2cos^2x+cosx=cos2x Solve algebraically for exact solutions in the interval [0,2π). Use your grapher only to support your algebraic work. 24. cos2x+sinx=0

algebra
3 radical x  4 radical y divided by 3 radical x  2 radical y = ( i think im supposed to use the distributive property, after the conjugate. but didn't know if i could just cancel? thanks.