# Homework Help: Math: Trigonometry

## Recent Homework Questions About Trigonometry

**Trig**

cos(3x)=-1

**Trig**

Solve Sinx=Cos2x-1 for all values between 0 and 2pi

**trig**

Determine the least positive value of t for which d=0. d=cos((3pi/4)(t)) 0=cos((3pi/4)(t)) I got stuck on this step Please help

**trig**

Determine the least positive value of t for which d=0. d=cos((3pi/4)(t)) 0=cos((3pi/4)(t)) I got stuck on this step Please help

**trig**

If theta is a standard position angle and cot theta = 1.85, in which quadrant(s) could theta lie?

**trig**

if tan(θ)=√(33) / 4 (√ does not ride over 4) find sin(θ)<0 i would just like to know the steps of how to do it.

**trig**

What would be the force required to push a 100-pound object along a ramp that is inclined 10 degrees with the horizontal?

**trig**

if sin theta equals 3/7, what is tan theta?

**trig**

howard and keight who are 2km apart are on a horizontal plane observe a balloon in the same vertical plane with themselves the angles of elevation are 50 degrees and 65 degrees respectively find the height of the balloon. A.if its situated between howard and keight B.If it is ...

**trig**

verify that 2/1+cos theta - tan squared (theta/2) = 1

**trig e-maths**

giving that cosx=4/5 and siny=12/13, find cos(x+y) when x is acute and y is obtuse angle

**trig**

a plane takes off at 10.00am from an airfield, and flies at 120km/h on a bearing of N35W. A second plane takes off at 10.05am from the same airfield, and flies on a bearing of S80E at a speed of 90km/h. How far apart are the planes at 10.25am?

**trig**

Find the general solution for x if cos2x + sin3x = sinx

**inverse trig HELP PLEASE!!**

Write the general solution to y = arcsin (0.6428). 40°±360°k 140°±360°k 220°±360°k 320°±360°k How do I find the right answer? I am like seriously stuck. I need help please.

**trig**

In a computer simulation, a satellite orbits around Earth at a distance from the Earth's surface of 2.1 X 104 miles. The orbit is circular, and one revolution around Earth takes 10.5 days. Assuming the radius of the Earth is 3960 miles, find the linear speed (velocity) of the ...

**trig**

solve for theta 6. tan theta=-1 7. sin(theta/2)=1/2 thank you for your help!

**trig**

when sin theta+cos theta=square root of 2,find the solution of sin^3 theta+cos^3 theta

**Algebra-Trig help asap**

A rhombus has sides of 5 cm each and one diagonal is 6 cm long. Find the area of the rhombus.

**Math:Trig.!!!!**

You (safely) bungee jump from a 200-feet tall bridge in your town. Your distance above the water's surface depends on the time since you jumped. Sketch a reasonable graph.

**trig**

solve the equation 2 tan C-3=3 tan X-4 algebraically for all values of C in the interval odegrees lessthan or equal C lessthan360 degrees.

**Trig-Algebra help asap**

A regular octagon is inscribed in a circle with a radius of 5 cm. Find the area of the octagon.

**Trig-Algebra help asap**

A regular pentagon is inscribed in a circle whose radius measures 7 cm. Find the area of the pentagon.

**Trig-Algebra help asap**

A rhombus has sides of 5 cm and one diagonal is 6 cm long. Find the area of the rhombus.

**Trig-Algebra help asap**

The adjacent sides of a parallelogram measure 8 cm and 12 cm and one angle measures 60 degrees. Find the area of the parellelogram.

**trig**

SOlve over (2,pie) and find the general solution in radians. 2sin3x = square root of 2

**trig**

5sin(2x)+4cos(x)=0

**trig**

5sin(2x)+4cos(x)+0

**trig**

cos x/1+sin x + 1+sin x/ cos x= 2sec x

**trig**

verify the identity algebraically- (5-5 cos x)(5+5 cos x)=25 (sin^x)

**Trig Help**

Prove the following: [1+sinx]/[1+cscx]=tanx/secx =[1+sinx]/[1+1/sinx] =[1+sinx]/[(sinx+1)/sinx] =[1+sinx]*[sinx/(sinx+1)] =[sinx+sin^2x]/[sinx+1] =[sinx+(1-cos^2x)]/[sinx+1] =??? This is where I'm stuck. Can someone help me. Please check what I got is right so far it's ...

**trig**

City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?

**trig**

City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?

**trig**

City A is 300km due east of city B. City C is 200km on a bearing of 123¤ from city B. How far is it from C to A?

**trig**

If sec theta = radical 5, what is the exact value of cos theta

**trig**

If sec theta = radical 5, what is the exact value of cos theta

**trig**

A ship sails 40 miles SOUTH and 15 miles EAST. Find the bearing from where it began? HELP.

**trig or geom**

i have to use pythagorean theorem to find the leg-measure of x. in the formula, x would be a^2. the hypotenuse is 11 and "b" is unknown. there is also a cosine with a measure of .4 at the top-most angle.. what is x? i don't know how to use cosine with the problem

**Trig.**

finnd a possible measure of the angle drawn in standard position that passes through the points (ã2,-ã2)

**calculus**

find max, min and saddle points of the give function f(x,y)=sin(x)+sin(y)+sin(x+y) 0<=x<=pi/4 0<=y<=pi/4 i have that dz/dx=cos(x)+cos(x+y) dz/dy=cos(y)+cos(x+y) and i set them equal to zero but im kinda confused on how to really solve that. i mean i got an answer ...

**Geometry/trig**

A ladder, 17 feet long, leans against a wall at a 49 degree angle to the ground. How far up the wall does the ladder reach?

**trig**

Find all angles in degrees that satisfy the equationtan∝ +√3=0

**Trig**

If CSC X = 4 in the quadrant 1, what is COS X?

**Alg 2 trig**

Write a sine equation for period= pie, amplitude=1/2, vertical shift up 1 and phase shift left pie/4. How would the equation be written?

**trig**

what is the exact value of cos(x+y) if tan=x sqare root 3 over 3 and sin y=square root 2 over 2?

**Trig**

How do you do this? 1-sin^2x/csc^2 x-1

**Trig**

HELP!!!! I don't know how to do the trig identity with this problem csc^4 x-cot^4x= Csx^2 x + cot^2x

**trig**

Simplify the expression cos^2 x (sec^2 x-1)

**Trig Proofs!**

I'm having trouble solving this proof. Can you help? cos^3+sin^3/cosx+sinx = 1-sinxcosx Thanks!:)

**trig**

solve each equation for è, giving a general formula for all of the solutions: 6. tanè=-1 7. sin(è/2)=1/2 Please show step by step on how to solve these. Im not sure on how to do them. Thank you for your help!

**trig.**

A ladder 20 feet long leans against the side of a house. Find the height from the top of the ladder to the ground if the angle if the angle of elevation of the ladder is 80°

**trig.**

A ladder 20 feet long leans against the side of a house. Find the height from the top of the ladder to the ground if the angle if the angle of elevation of the ladder is 80°

**trig**

if sin a=4/5 and is quadrant 2 and sin b= 8/17 and is in quadrant 1, find cos (a-b)

**trig**

16. Let W(ƒá ) be a point in Quadrant I on the unit circle with center O. W(ƒá )B is perpendicular to the x-axis at B, OB = 0.6. and W(ƒá )B ƒ 0.8. Find:

**Pre-Cal**

given the function y=2sin3x-1, identify the following below. also show its graph for the primary cycle. (identifying parts of a trig. equation) asymptotes= k= c= axis= primary cycle= period=

**ALG/TRIG**

I cannot seem to get the right answer. Animal Pulse Rate According to one model, an animal’s heart rate varies according to its weight. The formula N(w)=885w^-1/2 gives an estimate for the average number N of beats per minute for an animal that weighs w pounds. Use the ...

**ALG/TRIG**

Lost is an understatement..please help me understand this. Orbits and Distance Johannes Kepler (1571–1630)discovered a relationship between a planet’s distance D from the sun and the time T it takes to orbit the sun. This formula is , where T is in Earth years and ...

**Trig**

Please help. I can't get this problem at all. When two bubbles cling together in midair their common surface is part of a sphere whose center D lies on the line passing through the centers of the bubble. Also, angles ACB and ACD are 60 degrees. Show that the radius r of the ...

**Trig**

Prove sin(α+β)sin(α-β)=cos^2β-cos^2α

**Trig**

A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?

**Trig**

Prove cos^2t+4cost+4/cost+2=2sect+1/sect

**Trig**

Prove (3cosθ-4sinθ)^2+(4cosθ+3sinθ)^2=25

**Trig**

Prove sin(α+β)sin(α-β)=cos^2β-cos^2α

**Trig**

A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?

**Trig**

Prove cos^2t+4cost+4/cost+2=2sect+1/sect

**trig**

Q1: Prove cos^2t+4cost+4/cost+2=2sect+1/sect Q2: A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?

**Trig**

Prove cos^2t+4cost+4/cost+2=2sect+1/sect

**Trig**

A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?

**Trig**

prove sin(α+β)sin(α-β)=cos^2β-cos^2α

**geom/trig**

A 40 ft ladder leans against a wall so the base of the ladder is 11 feet away from the base of the wall . What angle does the ladder make with the wall?

**Trig**

A ship leaves port with a bearing of S 40 W. After traveling 7 miles, the ship turns 90 degrees on a bearing of N 50 W for 11 miles. At that time, what is the bearing of the ship from port?

**Trig**

prove sin(α+β)sin(α-β)=cos^2β-cos^2α please help... this is the only one I didn't understand out of all my homework...

**Trig**

prove sin(α+β)sin(α-β)=cos^2β-cos^2α

**trig**

if sin 7x = cos x+10 find the value of x

**trig**

find the general solutions to the equations: 1) sec x = -2 2) 2 sin^2 x = 1 3) cos^2 x - 2cos x + 1 = 0

**trig**

if cot(x-10)=tan(4x) what does x equal?

**trig**

Verify the trigonometric identity. Please show all steps. tanx-cotx/tanx+cotx=sin^2x-cos^2x

**Trig**

(cos^2t+4cos^2+4)/(cost+2)=(2sect+1)/sect

**Trig**

Prove (cos^2t+4cos^2+4)/(cost+2)=2sect+1)/sect

**Trig**

prove(sinx/cosx+1)+(cosx-1/sinx)=0 Please help asap!!!!! PLEASE

**Trig**

prove (cscx-secx/cscx+secx)=(cotx-1/cotx+1)

**Trig**

prove(sinx/cosx+1)+(cosx-1/sinx)=0

**trig**

y=25sin(120t-4x) what is the wave length what is the speed

**trig and geometry**

bernhardt and julia are observing an eagles nest in a tree. Julia is 75m from the tree, and sees it at an angle of elevation of 42 degrees A)How high up the tree is the nest B)Bernhardt is standing 30m behind julia. At what angle of elevation does he see the nest?

**trig**

Which expression is equivalent to cos(4x) + cos(2x)?

**trig**

bernhardt and julia are observing an eagles nest in a tree. Julia is 75m from the tree, and sees it at an angle of elevation of 42 degrees A)How high up the tree is the nest B)Bernhardt is standing 30m behind julia. At what angle of elevation does he see the nest?

**Trig FInd Translation Rule and Coordinates Thanks!**

The vertices of a rectangle are R(–5, –5), S(–1, –5), T(–1, 1), and U(–5, 1). After translation, R' is the point (–11, –11). Find the translation rule and coordinates of U'. (x, y)--> (x – 6, y + 6); (–11, 7) (x, y)--> (x – 6, y – 6); (–11, –5...

**Trig**

A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 3 mi apart, to be angle x = 31° and angle y = 49°, as shown in the figure. (Round your answers to two decimal places.) Find the distance of the plane from point A. Find the ...

**trig**

Find the value of theta (in radians) corresponding to the point (6,-8)

**Trig**

When two bubbles cling together in midair their common surface is part of a sphere whose center D lies on the line passing through the centers of the bubble. Also, angles ACB and ACD are 60 degrees. Show that the radius r of the common face is given by r=ab/a-b.

**trig**

8cos6xsin6x

**trig**

Expan each of the following using the compound-angle formulae:sin(x + 20degree)

**Trig**

Use a calculator to find θ to the nearest tenth of a degree, if 0° < θ < 360° and csc(θ)=1.4307 with θ in QII θ=?

**trig**

in this right trianlge ABC, m<c=90, m<a=63, and AB=10. if BC is represented by a, then which equation can be used to find a?

**trig**

solve for x log4 64+ log2 2 ________________ =x log3 81

**math/cal/trig solve for t**

solve for t: 0=4sin(2t)cos(2t)-sin(2t)

**trig**

Tan(cos inverse 5x)

**trig**

Choose the percent increase or decrease for the before and after measurements: 12 (before) and 12 (after) a) not given b) increase of 30% c) decrease of 25% d) increase of 25%

**trig**

Name three values of theta that would result in y equal to cot times theta being undefined.

**tRiG/ AlGeBrA**

1) Use double-angle identities to write the following expression, using trigonometric functions of x instead of 4x. cos 4x 2) Use half-angle identities to write the following expression, using trigonometric functions of x instead of x/4. sin x/4

**Math/Trig**

Period: Asymptotes: Range: a) y= 2 sec (x) + 1 b) y= -2 csc (x - pi/2) c) y= 1 + tan (x + pi/4) d) y= 1/2 + csc (x - pi) + 1 e) y= cot (3x + pi) + 2 Any tips on drawing the graph?