# trigonometry

2,090 results, page 5

### Trigonometry

Using the Law of Cosines, how can I show that the measure of each angle of an equilateral triangle is 60 degrees?

### Trigonometry

find sin2x, cos2x, and tan2x if sinx= -2/sqrt 5 and x terminates in quadrant III

### Pre-Calculus/Trigonometry

Help please Which of the following is the equation of a line that passes through the points (2,5) and (4,3)? y = -x + 7 y = x + 7 y = 2x + 5 y = -2x + 5

### Trigonometry

16 sin^2 x = 16 − 8 cos x Find all solutions of the equation in the interval [0, 2π)

### Math Trigonometry

A man is 6 ft. tall casts a shadow of 8 ft. find the angle of elevation of the sun.

### trigonometry

find the radius of a circle in which a 59 foot chord subtends an angle of 12 degree at the center

### Trigonometry

Find the length of the shadow of a 50 ft vertical pole when the angle of elevation of the sun is 28 degrees

### trigonometry

I need help solving this problem. Question: At what points will the line y=-x intersect the unit circle x2+y2=1?

### math / geometry

connections academy, trigonometry practice unit for lesson three answers

### Trigonometry

A wheel has a 12 inch radius rotating at 620 RPM. What is the speed of the car in MPH?

### Trigonometry

Solve: tan(2theta - 34deg)= sqroot3; theta = [real numbers of degrees]

### Plane trigonometry

Hi, could you help me solve the one cycle graph and the 5 points of this equation: Y=2sin pi(x+1/2)+1 thank you in advance!

### Trigonometry

How do I solve these linear system problems? I solved it many times but it never seems right. 1. x^2 + y^2 =9 2x - y = -6 2.x^2 - x -y =0 x - y = -3 3. 2x^2 - x - y = -1 3x + y = 5

### trigonometry

find the radius of the circle whose sector area is 426 sq.cm. and central angle 24

### Trigonometry

Is the given equation an identity or a conditional eqution sin(-x) tan(-x) + cos(-x) = sec x

### trigonometry

A ship sails 15.0 mi on a course S40°10’W and then 21.0 mi on a course N28°20’W. Find the distance and direction of the last position from the first.

### Trigonometry

Determine the angular velocity if 2.5 revolutions are completed in 10 seconds. Round to the nearest tenth.

### maths trigonometry

Expand the following using compound angle formulae Sin(m-n) Cos(p-55)

### Maths, triangle trigonometry

P, Q and R are three fire towers. Q is 40 km N 72°E of P and R is 48 km S 55° E of P. Find the distance between R and Q and bearing of R from Q.

### Trigonometry

what is the angle of elevation of the sun if the shadow of a 5'7" tall man is half the length of his height?

### trigonometry

find the number of radians in the central angle that subtends an arc of 6m on a circle of diameter 5m

### Trigonometry

FInd the arc length intercepted by a central angle of 46 degrees 24'6" in a circle with a radius of 35.62m

### Algebra And Trigonometry

After finding the values by using half angle formula, how to determined the quadrant

### math/trigonometry

solve secx/2=cosx/2 over the interval[0,2pi) without using a calculator

### Trigonometry

find (acute) angle A, given: a. sin A = 0.4919 b. tan A = 2.7775 c. cos A = 0.5757

### 12th grade

I'm having trouble ordered triple in algebra 2 w/ trigonometry, could someone please hellllllllllllllllllp me!

### FST (functions, stats, and trigonometry)

what is the equation for the axis of symmetry for the function f(x)=IxI?(absolute value)

### math(advanced algebra&trigonometry)

find, to the nearest minute, the angle whose measure is 3.45 radians.

### Trigonometry

What is the exact value of the cos of 23pi/12? (Twenty-three pi over 12, which is = to 345 degrees.) Thank you, Roger

### Algebra 2 with trigonometry

2sin2xcos2x cos^4x-sin^4x (sinx+cosx)^2-sin2x 2sinxcos^3x+2sin^3xcosx

### Algebra 2 with trigonometry

2sin2xcos2x cos^4x-sin^4x (sinx+cosx)^2-sin2x 2sinxcos^3x+2sin^3xcosx

### trigonometry

Find the length of the arc that subtends an angle of measure 70 degrees on a circle of diameter 15 centimeters.

### Trigonometry

Suppose the angle formed by the line 14y = 23x and the positive x-axis is è. Find the tangent of è.

### Trigonometry

Find the angle of elevation of the sun when a tree that is 10 yd tall cast a shadow 14 yds long

### trigonometry

state the amplitude, period and phase shift of the function y = tan (2 theta- 180 degrees)

### trigonometry

Find the radius of a circle on which a central angle of 3 pie over 2 radians subtends an arc of 60 ft.

### Trigonometry

Show algebraically how to confirm that cos2x=cos^2x-sin^2x using the sum and difference identities

### Trigonometry

Solve tan2 x + tan x – 1 = 0 for the principal value(s) to two decimal places. Please Explain

### Trigonometry

Solve each triange given the indicated measures of angle and sides b=43degrees y=36 degrees a=92cm

### trigonometry

Determine the area of triangle ABC, given the following information c = 40m b = 20m A = 48deg

### trigonometry

At what angle to the x-axis does the graph of y=sin x pass through (0,0)? Give numerical and visual evidence.

### Trigonometry

triangle ABC is isosceles, with AB=AC=15cm , and m<A = 150. What is the exact length of BC without using trigonmetry?

### Trigonometry

Which of the following is not a solution of the equation tan squared A =3? (1) -pie/3 (2) 2pie/3 (3) 5pie/6 (4) 120 degrees

### Math trigonometry

Find the measures of the acute angles of a right triangle whose legs are 9 cm and 16 cm long.

### Trigonometry

Let N be a 5-digit palindrome. The probability that N is divisible by 4 can be expressed as \frac{a}{b}, where a and b are coprime positive integers. What is the value of a+b?

### TRIGONOMETRY

Use the dot product to determine which of the following vector pairs are orthogonal. a. v1 = (-5,5) and v2 = (1,1) b. v1 = (154,169.4) and v2 = (88,64)

### trigonometry

To the nearest degree what is the angle formed with the ground by a 32 ft ladder if it is leaning against a wall at a height of 28 ft?

### trigonometry

rewrite each equation in rectangular form and describe the graph. solve for y if possible. a. theta = pi/6 b. r=8costheta

### Trigonometry

Determine exact solutions for each equation in the interval x E [0,2 pi] sin^2x - 3/4 = 0 *3/4 is a fraction 2tan^2x - square root 12 = 0

### Trigonometry

An aeroplane flies 200km on a bearing of 137 degrees. How far east of its starting point is it?

### Trigonometry

Use the trigonometric subtraction formula for sine to verify this identity: sin((π / 2) – x) = cos x

### Trigonometry

find the exact value of expression: sin( tan^-1(-radical11/radical5)-cos^-1(radical3/2))

### Trigonometry

find an equation of the line passing throug (2,6) and is inclined at an angle 60 degrees counterclockwise from the horizontal

### Trigonometry

Find the remaining trigonometric values if sin=-3/5 and theta terminates in Quadrent four. I'm not sure what they're asking

### trigonometry

Angle A is in standard position and terminates in quadrant IV. If sec(A) = 4 3 , complete the steps to find cot(A).

### Trigonometry

Can someone please help me explain in words how to what each piece of the equation modifies the whole thing in this: f(x)=-3csc(2x)+1

### Trigonometry

I'm supposed to find the angle reference for a degree of 0. I think the answer is 180 degrees. Is that correct?

### math-geometry-soh-cah-toa???

Thank you for using the Jiskha Homework Help Forum. Hopefully the following sites will help you: 1l http://www.mathwords.com/s/sohcahtoa.htm 2. http://en.wikipedia.org/wiki/Trigonometry I get how to use soh-cah-toa and everything but could someone help me with how to plug it ...

### Trigonometry

How do you figure out the exact circular function value of sec(23pie/6)? *I don't know how to get the [pie]symbol on my keyboard

### Trigonometry

Use the cofunction identities to find an angle x that makes the statement true: tan(2x-140) = cot(x+5)

### trigonometry

this question confused me can you please show me how its done. Reduce (csc^2 x - sec^2 X) to an expression containing only tan x.

### Trigonometry

how do you solve for y=sinX+2. just the phase shift and period. even how to graph if anyone knows. i got stuck with this one

### trigonometry-math

what is the solution set (in terms of pi) of the equation sin2t-cos^2t=1=sin^2t+sint in the interval 0<t<2pi

### Trigonometry

Given that circle A has a radius of 52 and a radii AB and AC form an angle of 132 degrees, find the exact length of BC

### Trigonometry

Liola drives 13 km up a hill that is at a grade of 10 Degrees what horizontal distance to the nearest tenth of kilometer has she covered

### Trigonometry

Solve the equation sin^2x-cos^2x=0 over the interval [0, 2pi). Having trouble getting started.

### Trigonometry

Fine the complete exact value of sin x = -sqrt3/2. I'm very lost as to how to even begin this problem.

### Trigonometry

How much work is done by raising a 117-lb box vertically 18.0 inches? A. 5,190 ft-lb B. 2,110 ft-lb C. 25,300 ft-lb D. 176 ft-lb

### Trigonometry

write sin(125degrees) in terms of its cofunction. Make sure your answer is a function of a positive angle.

### Trigonometry

Find all values of x such that sinx+sin2x=0 and 0 <= x <= 2pi <= means less than or equal to please help!

### Trigonometry

How do you find the exact value of cos -7pi/12 without using a calculator to change radian to degree

### Math Trigonometry

What is the maximum integer value of n, where n<148, that satisfies the following inequalities: sin(pi/2+(pi*n)/74)<0 and tan(pi−(pi*n)/74)<0?

### Trigonometry

Write sin(125°) in terms of its cofunction. Make sure your answer is a function of a positive angle.

### Trigonometry

Write sin (125°) in terms of its cofunction. Make sure your answer is a function of a positive angle

### Trigonometry

Write sin(125°) in terms of its cofunction. Make sure your answer is a function of a positive angle.

### Trigonometry

The area of a rectangle is a function of the length when the width is unity. Please answer.. My mind is going crazy ):

### Trigonometry

find the perimeter of an isosceles triangle whose base is 20cm and the vertex angle is 120 degrees.

### Pre-Calculus/Trigonometry

Am I right? Which of the following is the equation of a line that passes through the point (3,2) and is parallel to the y-axis? y = 3 x = 2 y = 2 x = 3 <---

### Pre-Calculus/Trigonometry

Solve the following system of equations algebraically. Verify your solution by using matrices. 3x-y=0 5x+2y=22

### Trigonometry

For all values of x for which the expressions are defined, prove the following equation identity 2/sec = 2-2 sin^2 x/ cos x

### Math: Trigonometry

Find the sum of the three smallest positive values of x such that 4cos^2(2x-pi) = 3. (Answer in radians.)

### Trigonometry and Right Triangles!

The length of the hypotenuse of a 30 60 90 triangle is 16. What is the perimeter? I'm just learning about this. Can someone explain?

### Trigonometry

Evaluate sin^-1(square route of 2over2) give the answer in radians. Please i really need this question. can you help me?

### Algebra

I am doing the amount of permutations in the word trigonometry. For the expression, I wrote 12!/2!2!2!. I got 968003200. Is this correct? If not, should I use parenthesese? Thanks

### Trigonometry

this is a propf and I need both sides to equal each other. Thanks this one stumped me. sin^3x/(1-cosx) = sinxcosx+sinx

### Trigonometry

What's the easiest way to remember how to draw the graphs for the common trigonometric functions, like sin cos and tan?

### 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

### Trigonometry

If sin A= -3/5 and angle A is in quadrant IV, find cos A. I know i have to use the pythagoream identity..but i keep getting stuck.

### Trigonometry

Find the area of a sector, given a central angle of 240degrees and a radius of 15 cm. Round your answer to the nearest tenth.

### Trigonometry

The angle of elevation of the sun is 20 degrees. At the same time,how long is the shadow cast by a building 50 meter high?

### Trigonometry

Find the angle of elevation of the sun when a tower 100m high casts a shadow of 120 meter long?

### trig

Ok, so im brand new at trigonometry. If i have a right triangle with an acute angle of 30° an opposite side of 4 and a hypotenuse of x how do ii find x

### Trigonometry

Solve. 2sin(2ƒÆ) + ã3 = 0 interval [0, 2ƒÎ) How do I start this? I feel like maybe Trig Identities, but I'm not really sure.

### trigonometry

refer to the graph of y=sin(x) or cos(x) to find the exact values of (x) in the interval [0,4pi]that satisfy the equation. 4sin(x)=4

### Trigonometry

Use the half-angle identities to find all solutions on the interval [0,2pi) for the equation cos^2(x) = sin^2(x/2)

### Trigonometry

Use the half-angle identities to find all solutions on the interval [0,2pi) for the equation sin^2(x) = cos^2(x/2)

### Trigonometry

wheels on a skateboard are 3.63 inches. If the skateboarder is travelling down a hill at 23 miles per hour what is the angular velocity.

### Math Trigonometry

Let f(x)=cos(pi*x/3) g(x)=1^x+(−1)^x h(x)=f(x)⋅g(x) where x is a positive integer. Given that h(x) has a range of exactly 3 different values: a, b and c, what is the value of a^2+b^2+c^2?

### Trigonometry

Suppose that (5/13,y) is a point in Quadrant IV lying on the unit circle. Find y. Write the exact value not a decimal approximation