# trigonometry

2,054 results, page 7

### Trigonometry

If sin A=3/5 and cosB = 24/25 and angle A and angle B are both in quandrant 1. What is sthe exact value of cos (A-B)?

### Math

Trigonometry Identities problem: Prove the following; (tan^2x)(cos^2x) = (sec^2x - 1)(1-sin^4x) ÷ (1+sin^2x)

### trigonometry

The wheels of a car have radius 11 in. and are rotating at 800 rpm. Find the speed of the car in mi/h. mi/h

### TRIGONOMETRY

Suppose tan theta=15pi/18 is less than theta 3pi/2 , what are the other trigonometric functions?

### Trigonometry

If Cot θ = -Square Root of 15/7, use the fundamental identities to find Cosθ > 0.

### Trigonometry

If 5cosA+3=0 and 180(degrees)<A<360(degrees) Determine 1. Tan^2A And 2. SinA over cosA

### math trigonometry

Prove that 2sin150*cos315*cos(90-x)/sin(360-x)cos(-240)sin135

### Trigonometry

An automobile tire has a diameter of 36 inches. How many revolution will the wheel make as the automobile travel 1 mile

### Trigonometry

If the terminal side of angle theta passes through point (-3, -4), what is the valuse of sec theta? 1) 5/3 2) -5/3 3)5/4 4)-5/4

### Trigonometry

Determine all the values of theta,0 degrees < or = theta < 360 satisfying csc(x)<0 and cot(x)>0

### Trigonometry

Evaluate arctan(cot10Pi/9) sec(arccos(-1/6) csc(arcsec(5/3) sin(2 arccos(sqrt5/5)

### Trigonometry

If 5cosA+3=0 and 180(degrees)<A<360(degrees) Determine 1. Tan^2A And 2. SinA over cosA

### Trigonometry

If 5cosA+3=0 and 180(degrees)<A<360(degrees) Determine 1. Tan^2A And 2. SinA over cosA

### Trigonometry

simplify: 2sin35 deg times cos35 deg.

### Trigonometry

[sinxcosx/(1+cosx(]-[sinx/(1-cosx)]= -(cotxcosx+cscx)

### trigonometry

If sine of an angle is ¼ and cosine of an angle is 15/4.. find cosecant.

### Trigonometry

Show that cos M(1/cosM-cosM) is equal to sin^2M

### Trigonometry

Where does the graph of y = tan theta intersect the graph of y = -1 where n is any integer?

### trigonometry

in triangle abc, m<c=90, bc=20, and ba=40. a.find sine a b.find measure of <a

### trigonometry

Graph the function f(x)=-1/2sin2x+1 on the interval [-2pi, 2pi]

### Trigonometry

Determine sin x - tan x - sin x=0 for 0 ≤ x < 360°

### Trigonometry

Can you verify this identity? cos(4x)cos(2x)= (1/2)[cos8x+cos2x]

### Trigonometry

Solve: 2cos^2 theta - 3cos theta+ 1= 0 interval [0, 2ð)

### Trigonometry

Solve triangle ABC: B= 60 degrees, C= 90 degrees a= 4 feet

### trigonometry

{1/(sec x - 1)} - {1/(sec x +1)} = 2 cot^2 x solve using identities?

### Trigonometry

Prove that cos(A+B)cosC - cos(B+C)cosA = sinBsin(C-A)

### Trigonometry

IfA=340°, prove that 2sinA/2 = -(v1+sinA) + (v1-sinA)

### Trigonometry

how many solutions does the system {y = x, y = tan x have? what is sec^-1 (sec-ð)?

### Trigonometry

Write tan(pi/4 - Beta) as a function of Beta only.

### Trigonometry

Write cos (lambda + pi/3) as a function of lambda only.

### Algebra 2/ Trigonometry

If cos θ = c, then sin²θ/2 equals 1) 1-c/2 2) 1+c/2 3) 1-c/c+c 4) 1-c/4

### Trigonometry

Solve tan2A - 2tanA = -1 for 0º≤A≤360º.

### trigonometry 28

In triangle ABC , if angle c=90°,then prove that sin^2 A+sin^2 B=1.

### TRIGONOMETRY

Express tan theta in terms of cosec theta

### Trigonometry

A=30 degrees, a=9 and b=8. Find the missing sides/angles. I did cos39=x/8 and reduced that to 8cos39=x. I got 6.92. But that's not a valid answer, so I can't go from there. What did I do wrong? Can you show me how to get the other answers as well, please?

### math(advanced algebra&trigonometry)

the expression cos4x cos3x + sin4x sin3x is equivalent to which one of the following is the answer: 1) sinx 2) sin7x 3) cosx 4) cos7x

### trigonometry

The function d=11cos6t describes a simple harmonic motion, where d is the distance(in meters) an object travels in t seconds. What is the time required for one complete cycle?

### trigonometry

please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.

### trigonometry

please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.

### trigonometry

please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.

### Trigonometry

Find all solutions of 4(sin(x)**2)-8cos (x) -8 = 0 in the interval (2pi, 4pi). (Leave your answers in exact form and enter them as a comma-separated list.)

### trigonometry

how fast is a toy car moving in ft/min if it makes 20 laps in one minute on a circular track of radius 3 feet ? ( i need to know how to set this problem up)

### Trigonometry

Law of Sines sigma=27 deg 30' c= 52.8 a=28.1 Please show two solutions (beta1, beta2,...) due to acute and obtuse angles. Thank you so much for helping!

### College Algebra and Trigonometry

if x = ucos(pi/4) - vsin(pi/4) and y = usin(pi/4) + vcos(pi/4), find A, B and C so that, 5x^2 - 6xy + 5y^2 = Au^2 + Buv + Cv^2. Thanks, I really don't know what to do, I've already used almost 20 sheets of paper. Please help me. Thanks.

### Pre-Calculus (Trigonometry)

An angle in standard position such that sinÈ = 5/13. Determine the possible values of È, to the nearest degree. Answer: I got 23°. (How do I get the second one?)

### Math

I'm in gr 11 doing Trigonometry 14.2 = b ---- ---- sin38 sin 67 a = 46 --- ---- sin20 sin130 (10.7)^2 = (9.5)^2 + (12.4)^2 - 2(9.5)(12.4) cos <B I just need someone to explain this to me because I just don't get it... thank you for any help

### Trigonometry

How do I find all solutions to: tanx+3cotx=4? The answer choices are: a.) x=arctan3+nPi b.) x=arccot3+nPi

### Math

Trigonometry problem: The sides AB and AC of triangle ABC are of lengths 4 and 7 respectively. M is the midpoint of BC. AM is of length 3.5, Find the length of BC.

### trigonometry

A pilot is flying with an air speed of 185mph. Find the ground speed of plane and the direction of flight.

### trigonometry

Use identities to simplify each expression. 1) (sin2t) (cos5t) + (cos2t) (sin5t) 2) {1/(sec x - 1)} - {1/(sec x +1)} = 2 cot^2 x

### Trigonometry

A side 2.8m long makes an angle of 25 degrees with the ground how high is the top of the slide above the ground .

### Trigonometry

Solve cos 2x – 3sin x cos 2x = 0 for the principal value(s) to two decimal places. Please explain.

### Trigonometry

A bicycle with a 26-inch wheel(diameter) travels a distance of 700 feet. How many revolutions does the wheel make?

### trigonometry

the bases of a trapezoid are 22 and 12 respectively. The angles at the extremities of one base are 65^ and 40^ respectively. Find the two legs

### Trigonometry

A bicycle is traveling at 20 feet/second. If the diameter of the wheel is 24 inches, what is the angular velocity in radians/second?

### trigonometry

the angle of elevations from the top of the tree to the point on the ground is 63 yards from its base 45degrees. How tall is the tree?

### Trigonometry

Johns eyes are 6 ft from the ground. He is standing 70 ft away from a tree. If the angle of elevation is 24 degrees, then how tall is the tree?

### Trigonometry

Graph the following functions .include two full periods .a)y=3cos(2x) and b)y=-4sin(4x) on same graph

### trigonometry

a motor boat moves in the direction of N 38° E for 3 hrs at 20 mph. How far north and how far east does it travel?

### Trigonometry- ??????

Solve the equation for 0≤ x ≤ 180 given tan(x) sin^2(x)=2tan(x) How do I do this? Thank you and Merry Christmas! :)

### trigonometry

what is the smalliest positive anglecoterminal of -61 degrees,501,632,1024,-350,721,-0.5 and 512 degrees?

### Trigonometry

A rocket is launched from a tower that is 200 feet high at 1000ft/sec at 48°. How far does the rocket travel?

### trigonometry

if tan theta= 1/2, find the exact values of the five remaining trigonometric functions for theta, which is acute

### trigonometry

The shadow of a vertical tower is 65 ft long when the angle of elevation of the sun is 35 degrees. Find the height of the tower

### math- Trigonometry

If cos degree equals to 0.8641 What is Sin degree? I have no idea how to find this. Please help me. Thank you

### maths trigonometry

solve the equation (cos theta +1)(tan theta minus 1)=0 for solution between 0 and 2pii.

### maths trigonometry,

find all solutions between 0 and 2pii for (tan theta =1)and (cos theta =negative 1/2).

### Calc

Question: Using trigonometry, add these two vectors. 7m/s [N30E] and 2m/s [S17E]. THIS is my answer: 6m/s [N45E] is this the correct answer?

### trig

how come you get different answers if you take different paths in trigonometry? (when you choose to use sin, cos or tan)

### trigonometry

given triangle ABC with AB=7cm, BC=8cm and AC=9cm calculate 1. the size of the largest angle 2. the area of the triangle

### trigonometry

Find all the angles between 0 degrees and 360 degrees which will satisf y the equation: 5tan^2 y +5 tan y = 2 sec^2 y

### trigonometry

an automobile tire has a diameter of 36 inch.how many revolution will the wheel make an arc the automobile travels 1 mile (5280 A)?

### Trigonometry

What is the period of y = ã3sin (1/3x-ã1/3)? A, 6ƒÎ B. ã3ƒÎ C, 2ƒÎ/3 D. ƒÎ/3 What is tan^-1 ã3/3? A. ƒÎ/6 B. ƒÎ/4 C. -ƒÎ/3 D. -ƒÎ/4 What is the frequency of y = tan (ƒÎ/3 x) ? A. 3 B. 1/6 C. ƒÎ/3 D. 1/3 What is the amplitude of y = 1/5 sin (ã...

### Trigonometry

√3 + 5cos⦸ = 3 cos⦸ Can someone please explain for me how to express the answer in radian measure? Thanks

### Trigonometry

Triangle ABC is given where the measure of angle a is 33°, a=15 in., and the height, h, is 9 in. How many triangles can be made with the given measurements? Explain your answer.

### trigonometry

an isosceles triangle is inscribe in aradius 100 in .find the angles of the triangle if it is base subtends an arc of 143.7 in

### trigonometry

It is given that sin(θ)=15√. In addition, a and b are coprime positive integers such that cos(2θ)=ab. What is the value of a+b?

### Math (Trigonometry)

In triangle ABC, we have AB = 16, BC = 29 and CA = √1097. What is the integer that is closest to 100 sin∠ABC?

### Trigonometry

What is the surface area of the cube below? answer in simplest radical form only one surface is 576 cm^3

### algebra & trigonometry

The sum of two numbers is 210. If one number is the square of the other, find the set of numbers. Thanks

### Trigonometry

Use De Moivre's Theorem to write the complex number in trigonometric form (cos(2pi)/7)+ i sin((2pi)/7))^5

### trigonometry

one leg of the right triangle is 10 cm and the hypotenuse is 20 cm longer than the other leg.Find the lenght of the unknown sides.

### maths trigonometry

solve the equation (2cos theta +1)(tan theta minus 1)=0 for all values between 0 and 2pii.

### trigonometry

a triangle has sides equal to 68 cm, 77 cm and 75 cm, respectively. find the area of the escribed circle tangent to the shortest side of the triangle.

### trigonometry

2*cos^2(a/2)=(sin^2(a))/(1-cos(a)) can anyone help to prove this identity?

### Trigonometry

Where does the graph of y = tan theta intersects the graph of y = -1.

### trigonometry

how to solve sin 4x= cosx(4 sinx - 8 sin ^3x)

### Trigonometry

How do you simplify: -5(cot^2 theta - csc^2 theta)?

### Trigonometry

verify the identity: (1-cosx)(1+cosx)= sin^2 x

### Trigonometry

verify the identity: 1-cos^2x/1-sinx= -sinx

### Trigonometry

verify the identity: 1- (cos^2x)/(1-sinx)= -sinx

### Trigonometry

Verify the Identity: (1-cosx)(1+cosx)=sin^2x

### maths (trigonometry)

if sec x +tan x=p, then tan xeuqalto what. How?

### maths trigonometry

if theta = 45, the value of cosec ^ 2 theta is ?

### Trigonometry

Prove that cos(A+B) + sin(A-B) = 2sin(45°+A)cos(45°+B)

### Trigonometry

Prove that tan2A = (sec2A+1)√sec²A-1

### Trigonometry

cos²a + cos²(a+120°) + cos(a-120°) = 3/2

### Trigonometry

In a right triangle with ã the right angle, b = 86.5 and c = 125.8. What is â

### trigonometry

Prove cotx-1/cotx+1=1-sin2x/cos2x