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278 Answered Questions for the topic Trigonometric Functions

Trigonometric Functions

03/08/18

how to get the five trigonometric function of secA =2

find the other five trigonometric function of sec A = 2
Trigonometric Functions Math Help 12th Grade Maths

03/08/18

Show that the curve y=2sin2x -4x is never increasing

I am confused about how to differentiate 2sin2x or how to show that it is less than 0 and I have been trying to figure this out by various websites but it will not give me a clear answer. I would... more
Trigonometric Functions

03/08/18

tan theta=-3.966 and pie/2<theta<pie Find sin theta

Find the values of sin theta and cos theta 
Trigonometric Functions Precalculus Trigonometry

03/04/18

sec( theta+45)=1

We are doing simple trig equations, you know, where like 1/2 =cos(theta) and you find on the trig circle what that is equal to. So it would be 60 and 300 degrees. However, I don't know how to solve... more
Trigonometric Functions Trigonometry Trig

03/02/18

Solve on the interval [0, 2pi) (cosx+1)(2cos^2x-3cosx-2)=0

I'm really confused on how to solve this.
Trigonometric Functions Trigonometry Trig

03/02/18

How to solve cos(x)(cosx+1)=0

I missed this class so I'm really confused on how to solve this.
Trigonometric Functions Trigonometry Trigonometry Identities

03/02/18

Solve on the interval [0,2pi) 1-cos theta = (2 - sqrt 3)/2

I dont quite remember how to solve this, if anyone could help.
Trigonometric Functions Pre Calculus Trigonometric Identities

02/23/18

Can someone explain to me how you would establish this identity: cos(a-B)•cos(a+B) = cos^2a - sin^2B

Please include each step so I can follow along
Trigonometric Functions

02/19/18

Finding exact value of trigonometric functions.

How do you find the exact value of these trigonometric functions? My book has several listed so I’m just going to pick one in degrees and one in radians.  Sin 45° Sin pi/3   There are also cos... more
Trigonometric Functions

02/17/18

what is 4 tan theta cos square theta = 3 tan theta in the text of finding all the angles between 0 and 360 degrees

I'm trying to find all of the angles between 0 and 360 and how i get it like the solving your work part 
Trigonometric Functions

02/08/18

pi<theta<2pi and tan theta = (sqrt 5)/2 find the values of the other 4 trig functions

Cant find a similar type of problem on google. Textbook didn't help.
Trigonometric Functions

02/06/18

find the values of the 6 given trigonometric functions of theta with the given constraint:

function value:  sin(x)=0 constraint: sec(x)=-1
Trigonometric Functions Trigonometry Trig

01/31/18

TRIG 1/2 ANGLE FORUMLAS

The questions are: "If sin B = -1/3 with B in QIII, find tan B/2. Also find sin B/2   The answer for tan B/2 is-3-2sqrt(2)   The answer for sin B/2 is \sqrt((3+2\sqrt(2))/(6))   These are... more
Trigonometric Functions Math Trigonometry

01/26/18

Convert products to sum or difference

a) 2sinα•cos2α b) 2cos3α•cos2α
Trigonometric Functions

01/19/18

Given a function value of an acute​ angle, find the other five trigonometric function values. csc =1.6 what are the other 5 functions

What are the 6 functions
Trigonometric Functions

01/17/18

Help needed in determining sin(x +y).

Question:   Determine sin(x + y) when sin(x) = 1/3, -π/2 ≤ x ≤ π/2 and cos(y) = -1/4, π ≤ x ≤ 2π     Much appreciated if anyone might be willing to help me out on this one.
Trigonometric Functions Grade 12 Advanced Functions

01/10/18

a pendulum swings back and forth taking 2 seconds to move from the position directly above from point a to the position directly above point b, as shown in the

a pendulum swings back and forth taking 2 seconds to move from the position directly above from point a to the position directly above point b, as shown in the figure below. the distance form a to... more
Trigonometric Functions Equations Trignometry

12/12/17

Solving a trigonometric equation

A point on an industrial flywheel experiences a motion described by the function h(t)=13cos(pi/0.35)t + 15.   What is the general solution for the time it takes to reach maximum... more
Trigonometric Functions Trigonometry Trigonometry Functions

12/09/17

Sinusoidal functions (wave problem)

The depth of water in a certain area can be estimated by using this equation:   h(t)=-4.3cos(pi/6.35(t+1.6))+8.4   A boat requires a depth of 7.2 m to ensure safe passage into the area. The... more
Trigonometric Functions Trigonometry Cosine

12/06/17

Application of a sinusoidal function

Suppose a sales can be modelled by the equation;   S=200+200cos[pi/6(t+2)]   where t is time in months with t=0 corresponding to January for what month are sales equal to 0?
Trigonometric Functions Math Precalculus

12/03/17

I don't understand what this trig problem is asking!!!!!! Can provide more info if needed

If csc(α) = 3, where 0 < α < π/2, and β is a Quadrant II angle with tan(β) = −7, find   cos(α+β)   And there are others that I'm supposed to find, such as sin(α+β), but this is just the... more
Trigonometric Functions Math Trigonometry

12/01/17

if h(x) = f(g(x)) where h(x) = sinx and f(x) = cosx which of the following could define the function g

options given g(x) = √(x2-1) g(x) = √(1-x2) g(x) = (π/2) +x g(x) = (π/2) - x g(x) = tanx I tried doing it but cos^-1(sinx) isn't possible to do with what i know
Trigonometric Functions Trigonometry Phase Shift

11/30/17

Sinusoidal functions (phase shift)

A sine function has a maximum value of -5, a minimum value of -29, and consecutive minimum values when x= -π/5 and x= (4π)/15. Determine the phase shift
Trigonometric Functions Trigonometry Math Help

11/28/17

Trig equations

A boat sails on a bearing of 75° for 128miles and then turns and sails 203miles on a bearing of 191°. Find the distance of the boat from its starting point.   I am unsure how to solve this equation
Trigonometric Functions Trigonometry Math Help

11/15/17

Solve a trig equation

solve the equation for the solutions over the interval [0 degrees, 360 degrees)   6sec2xtanx=12tanx   I am unsure of where to begin.
2 4 5 6 7 12

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