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Tutors Answer Your Questions about Trigonometry-basics (FREE)
Question 45148: hello :
i really could use some help with this problem. i am a little confused with this one
thank you in advance, it is greatly appreciated.
terry
find the exact value of : sin 2 theta, cos 2 theta, tan 2 theta
sin theta = - 4\5 270 degrees less than theta. theta less than 360 degrees
Click here to see answer by stanbon(26295)   |
Question 46468: The pH of a solution is given by Ph = log x where x is the concentration of hydrogen ions in solution in moles per liter. What is the hydrogen ion concentration in a base solution with a pH of 9.3?
A) 1.9952 X 10^9
B) 9.1424 X 10^-5
C) 0.1075
D) 5.0119 X 10^-10
Click here to see answer by Nate(3495) |
Question 46853: Can you please help me with this question? it says "What are the following trigonometric identities for the following:"
1.) (double angle) cos2x=
2.) cos(a+b)=
3.) (double angle) sin2x=
4.) sin(a+b)=
...any help u can offer will be apreciated thank you for you time...
Click here to see answer by Nate(3495) |
Question 47633: Help please!- The approach pattern to an airport requires pilots to set an 11 degree angle of decent toward a runway.If a plane is flying at an altitude of 9,500 m at what distance (measured along the ground) from the airport must the pilot descend?-Thank you!
Click here to see answer by Nate(3495) |
Question 47633: Help please!- The approach pattern to an airport requires pilots to set an 11 degree angle of decent toward a runway.If a plane is flying at an altitude of 9,500 m at what distance (measured along the ground) from the airport must the pilot descend?-Thank you!
Click here to see answer by stanbon(26295) |
Question 47861: Sketch one period of the following trigonometric graphs:
a.) cos^2(x)
b.) |sin x|
c.) y= 3 cos (4x) - 1
I am not certain about my answers...can someone show me how it will look? thanks i really need the help.
Click here to see answer by Nate(3495) |
Question 47889: I tried to figure out the period of the following functions can you tell me if they are correct?
"find the period of the following functions"
a.) 
period: 180?
b.) y=-3tan( x)
period: 2?
c.) 
period: 180?
d.) y=-3sec(-6x)+2
period: -60?
if not can you help me with the correct answer? thank you.
Click here to see answer by Nate(3495) |
Question 47884: Please help with solving the following trigonometric equations for the given domain:
sinx = cos(x) .....on [0,2]
sin2x = .......on [0,2]
what do they mean when they say on[0,2] ? can you provide an explaination or an example please?? thank you.
Click here to see answer by stanbon(26295) |
Question 47978: can someone help me with the following i'm kind of lost at what to do. thanks!!
"Evaluate the following expressions:"
a.) 
b.)  ...(note) that is sin^2
c.)  ...(note) that is sec^2
d.) is finding out an angel first of all
i know that i have to use the unit circle but i dont know what to do.
any help would help thanks!!!
Click here to see answer by ChillyWiz282(3) |
Question 48064: "solve the following trigonometric eqaution for the given domain (cont.)":
can someone show me how to solve the below eqautions and explain them to me? thanks.
i dont understand what you have to do with the "x" and a lot of other things. please help thank you.
a.) sin 3x =  ....for all x
b.) tan 2x= 0 ....on [ , ]
c.) secx= 2......for all x
d.) sin^2 x + sin x=0....on [0,2]
Click here to see answer by stanbon(26295) |
Question 49744: cot 60 degrees
tan 210 degrees
sec 210
csc 210
cot 210
cos 11pi/6
cot 3pi/2
tan 2pi/3
csc 5pi/6
please help if anyone can do it i need it by thursday 8/23/06 by 6:30 tomorrow morning please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Click here to see answer by venugopalramana(3286)  |
Question 50950: Please help with the following problem: Solve for z in terms of y: z-zsiny=1. i started by subtracting the one to the other side and then dividing by z getting (z-1)/z=siny. now i have no idea what to do or if what i did was right. please help!
Click here to see answer by stanbon(26295) |
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