# Trigonometry

**trig**

what is the correct answer in proving trigonometric identities if tan theta cos^2 theta + cos^2 theta

**Trig**

Its a 30-60-90 triangle there's a line in the center that= 10 a. What is the length of the hypotenuse of triangle ABC? b. What is the length of the shorter leg of triangle ABC? c. What is the length of the longer leg of triangle ABC?

**Trig**

angle b=25 degrees, angle c=90 AB= 25 a. Find the length of side b to two decimal places. b. Find the length of side a to two decimal places in three different ways.

**Trig**

Sarah used her calculator to find sin125 degrees . She wrote down sin125 degrees = -.57. How could Sarah recognize that her answer is incorrect?

**trig**

a grocery store display consists of cases of soda. there are 15 cases at the base, and 1 case at the top. if there are 15 rows, how many cases are needed for the entire display? a) 180 b)30 c)130 d)15

**trig**

What is the length of the circular arc intercepted by a central angle of 20degrees in a circle with a radius of 5cm?

**trig**

What does sin(squared)t + cot(squared)tsin(squared)t equal? and can someone explain it?

**alg2/trig**

starting salary for a job is $30,000 with a guaranteed raise of $5,000 each year for the first 5 years. write an explicit formula to represent how much money you would earn each year. please somone help!

**trig**

The angle of elevation to the top of a very tall Building is found to be 15° from the ground at a distance of 1 mi from the base of the building. Using this information, find the height of the building

**Math-trig**

A Ferris wheel with a diameter of 100 feet rotates at a constant rate of 4 revolutions per minute. Let the center of the Ferris wheel be at the origin. The height h (in feet) of a Ferris wheel car located at the point (x, y) is given by h = 50 + y where y is related to the ...

**trig**

4 costheta +3sintheta=5,4sintheta-3costheta=WHAT

**trig**

in proving trigonometric identities if sec theta - tan theta sin theta is equal to cos theta. what is the correct answer?

**trig**

in proving trigonometric identities if 1 + sin^2 theta is equal to 2 sin^2 theta + cos^2 theta. what is the correct answer?

**trig**

in proving trigonometric identities if cot theta sin theta = cos theta. what is the correct answer?

**trig**

starting salary for a job is 30,000 with a guaranteed raise of $5,000 each year for the first 5 years. write an explicit formula to represent how much money you would earn each year. how much money would you earn in the fifth year?

**trig**

How can I find the exact value of 4cos(7ð/4)-2sin(ð/3)?

**trig**

how can we find the value of sin -720

**alg2\trig**

a colony of 300 bacteria doubles each day. write an explicit formula to determine how many bacteria there would be on the nth day. how would you do this?

**trig**

The terminal side of θ lies on a given line in the specified quadrant. Find the values of the six trigonometric functions of θ by finding a point on the line. Line: (55/48)x Quadrant:III sin(θ)= cos(θ)= tan(θ)= csc(θ)= sec(θ)= cot(θ)=

**trig and algerba**

6+7(t - 1) = 5(t + 7) + 8 what does t equal

**trig**

If A=55 degrees 55 minutes and c=16, find a.

**trig**

Prove (1+secx)/(tanx+sinx)=cscx

**trig**

Find the indicated trigonometric function, given that è is an angle in standard position with the terminal side passing through the given point. 2) (15, 20); Find csc è. A) 5/3 B) 3/4 C) 5/4 D) 4/3

**Trig**

Solve the following trig equation 2cos(x-π/6)=1

**Trig**

Prove (1+secx)/(tanx+sinx)=cscx

**Trig**

Solve 5^2x -4(5^x)=12

**Trig**

Solve Log[8](log[5]x)=0

**Trig**

Write the following in terms of sin(θ) and cos(θ); then simplify if possible. csc(θ) - cot(θ)cos(θ) =

**alg2\trig**

if a3= 17 & a8=37 are terms in annarithmetic sequece, fina a1 & d. the answer is a1=9 & d=4 but i don't understand how they got the answer, please help!

**trig**

sin2x=cos3x then sinx=?(if 0<x<pi/2)

**trig**

Find sec^2 x (4 tan^2 x-3)

**Trig**

Sketch a unit circle and label the terminal points corresponding to t= pi/4, 3pi/4, 5pi/4, 7pi/4. Include the coordinates of each point. I have 3 other problems like this and i have no clue how to do them. can someone help please?

**trig**

if x is an acute angle and sinx= cosx then find the value of x?

**Precalculus**

Consider the equation 7sin^2x - (4sin2^x)/cosx = -1 a) Put the equation in standard quadratic trig equation form. Why is it 7sin^2x - 8sinx + 1 =0?

**trig**

What is cos(11pi/3)? Explain your thinking. What is sin(13pi/4) ? Explain your thinking.

**trig**

Sketch a unit circle and label the terminal points corresponding to t= pi/4, 3pi/4, 5pi/4, 7pi/4. Include the coordinates of each point

**trig**

What are the coordinates of the terminal point determined by t=7pi/6 ?

**Trig**

tan(θ) = a (a ≠ 0), find cot(θ).

**TRIG**

Find the remaining trigonometric ratios of θ if sin(θ) is given and θ QI sin(θ)=7/sqrt 149 cos= tan= cot= csc= sec=

**trig**

how to do root3 value

**trig**

Graph f(x)= second(2x+3.14/4)

**trig**

Determine if the value of each trig function is positive, negative, zero, or undefined. a) tan 310 degrees b) cos 7pi/6 c) sin -245 degrees d) sec( -7/2)

**trig**

Find the length of the circular arc intercepted by a central angle of 20 degrees in a circle or radius 5cm

**trig**

Find the reference angle for each given angle: a) 325 degrees b) 14pi/3 c) -190 degrees

**trig**

If point G(a,b) lies on the terminal side of angle theta in standard position, what is the value of sin(theta) if point G also lies on the unit circle?

**trig**

If point (3, -8) lies on the terminal side of an angle A in standard position, find: a) sinA b) tanA

**trig**

If the point (-3,0) lies on the terminal side of angle theta in standard position find: a) csc theta b) cot theta

**trig**

The second hand on a clock is 8 inches long. If the second hand travels a distance of 10pi inches, what is the positive radian measure of the angle that the second hand travels through?

**trig**

Are 22pi/5 and 100 degrees coterminal? explain.

**trig**

Find the exact value. Without using a calculator a) cos (-17pi/6) b) sec (3pi/2)

**trig**

If theta is the measure of an angle in standard position with the given conditions, find the quadrant(s) in which the terminal side of theta lies. a) cot theta < 0 b) cos theta > 0 , csc theta < 0

**trig**

Use a ratio identity to find tan(θ) if given the following. sin=6/sq rt 37 and cos 1/sq rt 37

**trig**

Find the remaining trigonometric ratios of θ if sin(θ) = -1/6 and θ is not in QIII cos tan cot csc sec

**trig**

Give the reciprocal of the following. 7/15

**trig**

If sin(θ) = 8/17 and θ terminates in QI, find cos(θ)

**trig**

find two values of theta, zero degrees is than or equal to theta which is less than 360 degrees, that satisfy the given trigonometric equation. tan theta equals radical 3.

**trig**

Find y if the point (7, y) is on the terminal side of θ and cos(θ) = 7/25

**trig**

a. A sector that has been cut out of circular plastic sheet which has a circumference of 12.31 m. If the central angle of the sector is 1/4 of a revolution, find the area of the sector.

**trig**

What is the fundamental period of the function f(x)=4/9sinx

**trig**

Find the length of side b to the nearest whole number if side a=105,angle A=65 degrees and angle B=37 degrees?

**trig**

how to find out maxima of function 3acos3theta

**trig**

not sure how to simplify tan(t+pi)/sin(t+2pi)

**trig**

city A is 300 miles directly north of city B assuming the earth to be sphere of radius 4000 miles determine the difference in latitude in degrees of the two cities

**Trig**

If a plane takes off on runway 31 (N 31o W) and flies 4 miles, then makes a right (90o) turn and flies 11 miles, what bearing will the traffic controller use to locate the plane?

**trig**

If the line OP of radius and(x,y) is rotated through a certain angle about the oringin

**alg2/trig**

what is the smallest value of k that would make the roots of the equation x^2-2x-k imaginary? please help, no idea how to do this.

**trig**

tan-5n over 3

**TRIG HELP ASAP**

I need help trying to find the major and minor axis on this problem: x^2+3y^2-6x+24y+6=0

**trig**

How do you decide if csc=74 is greater than or less than cos=74 without using a calculator?

**Trigonometry**

What are these things called: -cos x = cos -x What are the rules to these trig rules? Thanks

**trig**

4cos^2 theta = 3 where 0 degrees < theta< 360

**alg2/trig**

1)3x^2-12x-21 solve by completing the square in simplest radical form 2) (1/x+3)-(2/3-x)=(4/x^2-9)find values of x 3)3/radical(3a^2b^4) is equivalent to 4) factor completely 27x^-75x^4

**trig**

Please explain to me how to get this -- what quadrant tan theta < 0, sin theta < 0 is in.

**Trig**

what quadrant is this in and please explain... sin theta < 0, cos theta > 0

**trig**

5pi/7 what quadrant is it in???

**Trig**

Find the speed in both radians per second and degrees per second for the hour hand, the minute hand, and the second hand on a clock.

**algebra 2 trig**

express the product of (2/3x^2-1/2x) and (12x+4/5) as a trinomial

**trig**

How to get 5degree without using calculator using identities?

**trig**

if you are riding on a ferris wheel that is 60 ft tall and it takes you 5 minutes to make 1 revolution, what is your linear velocity?

**Math**

Would someone verify these answers. 1. A person waves his hand back and forth, where their finger tips move past the starting position 4 cm in each direction. If he waves 20 times every 15s, what sine equation models the movement of the hand if the hand starts in the upright ...

**trig**

I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x)= secx i(x)= cscx

**trig**

I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x0= secx i(x)= cscx

**trig**

If theta =( -7pi )/( 3) , then sec(theta) equals...?

**trig**

How do I get exact measures? cosine 270 degrees sin 90 degrees tan 360 degrees csc 45 degrees no calculator!

**trig**

how do I find this without a calculator? sin 90 degrees?

**geom/trig**

Using scissors to cut a rectangular piece of paper from one corner ro the opposite corner. The cut is 36 cm long and makes a 34 degree angle to the uncut edge. How many cm long is the paper (from the corner where he started the cut?

**trig**

I have a couple of these and cannot locate directions I can understand-please help! Draw the graph of y=3cos(2x) for 0< or= x < or = 2 pi

**Trig**

(x+3)^2/4^2 + (y-2)^2/5^2 The location of the Foci are at: a.(-3,-1) and (-3,-5) b. (-3,2) and (-3,5) c. (-3,-3) and (-3,7) d. (-3,1) and (-3,-5) I get (-3,2) and (-3,5) Am I correct?

**trig**

From the top of a hill 700 ft. high, an observer notes that the angles of depression of two successive markerstones on a level ground, which leads straight away from the hill are 5 degree and 15 degree respectively. Find the distance between the two markerstones.

**Trig-Please check**

What are polar coordinates of (4,6) 1.Round r to nearest hundredth and theta to nearest hundredth of RADIAN My work: r^2 = x^ + y^2 r^2 = 4^2 + 6^2 r^2= 16 +36 r^ =52 r=7.21 I'm stuck on how to do theta in Radians, could you please assist

**trig**

3x^2+16y^2=48 conic sections

**trig**

I need help finding derivatives and antiderivatives. Given: f(x),find f'(x) 1. f(x)-2x^6 2. f(x)= -3x +7 3. f(x)= 3x^2 - 5x 4.f(x)= 1/2x^2 - x + 4

**Trig**

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

**trig**

evaluate sin (11pi/6) to the nearest thousandth.

**trig**

write sec theta in terms of sin theta when theta lies in quadrant III

**trig**

what is the amplitude of y=2+cos(-1/2 theta)?

**Trig**

The question is: Set up a 2 column proof to show that each of the equations is an identity. Transform the left side to become the right side. a. (tan + cot)^2 = sec^2 + csc^2 I'm having trouble with this. b. (cos + sin)/cos + (cos - sin)/sin = csc sec I'm having trouble with ...

**Trig**

(sin/cos)/ ( 1/cos - 1) = I'm stumped

**Trig**

Proving Identities: 2 columns (tan + cot)^2 = sec^2 + csc^2 I'm having trouble breaking down the left side to = the right side.. Any help please

**trig**

how do you work find sin (a-B)beta sign. sin a = 12/13,a lies in quadrant II,and cos B = 15/17, B lies in quadrant I.