Questions on Algebra: Trigonometry answered by real tutors!

Tutors Answer Your Questions about Trigonometry-basics (FREE)

Question 312022: find all the angles between 0degree to 360degree which satisfy the equation:
sin2x=-0.7880
Click here to see answer by nerdybill(6958)

Question 312079: Hello there. I have a silly problem really. i have a function : f(x)=-2cos(2x+pi/2). I need to draw a graph of it. I've found the spots(zero,minimal,maximal) and I am not sure of whether I'm supposed to draw it from coords -pi/4,-2 or -pi/4,2. please help me.
Click here to see answer by Fombitz(13828)

Question 312171: Please help me with this question and show all steps if possible thank you!

Click here to see answer by nyc_function(2733)

Question 312176: Please help me with this question and show all steps if possible thank you!

Click here to see answer by Fombitz(13828)

Question 312174: Please help me with this question and show all steps if possible thank you!

Click here to see answer by fractalier(2101)

Question 312174: Please help me with this question and show all steps if possible thank you!

Click here to see answer by Fombitz(13828)

Question 312198: Value of angles in degrees for a right triangle whose legs are 0.5' and 4.0'
Click here to see answer by nyc_function(2733)

Question 312153: a) identify it as odd or even
b) give the period
c) give the amplitude, the minimum and maxium
d) graph the function.
1. y=sin(2x)
2. y=1+cos x
3. y= -1+3sin(2x)
Click here to see answer by Edwin McCravy(8909)

Question 312364: Find the exact value of cot(sin-1 7/9)
I really have no idea, I was looking for a value of 7/9 on my table but I can't find it.
Click here to see answer by scott8148(6628)

Question 312464: 2x-cos(x)+1=0
2x-cos(x)+1+1
Solve for x in both
Click here to see answer by Fombitz(13828)

Question 312465: 2x-cos(x)+1=0
2x-cos(x)+1=1
Solve for x
Click here to see answer by Fombitz(13828)

Question 312677: marie is sailing from an island to a harbor, a distance of 100km. A strong current takes her 13.7 degrees off course for the first 50 km. How far is she now from her destination?
Click here to see answer by mananth(12270)

Question 312680: the height of a radio tower is 450 feet. how long should a guy wire be if it is to connect to the middle of the tower and be secured at point 100 feet from the base?
Click here to see answer by mananth(12270)

Question 312678: Solve for 0 with a slash in between. Express your answer in Rdians.
cos 0 with a slash= -1/2 a and , with a slash under it, 0 with a line in between it < with another line under it and then 3 pie/ 2.
how do i solve

Click here to see answer by Fombitz(13828)

Question 312929: find sin 0 if cos 0=-2/3 and 90 degree<0>180 degrees
Click here to see answer by stanbon(57347)

Question 312927: What is the expanded logarithm of log3 a^6
Click here to see answer by nerdybill(6958)

Question 312955: find the acute angle A to the nearest second when
Click here to see answer by Fombitz(13828)

Question 312974: in triangal PQR, m angleQ = 90 degrees, RQ = 3 and RP = 5 what is cos P
Click here to see answer by nyc_function(2733)

Question 313168: hi i need to know ow to solve functions
Click here to see answer by solver91311(16885)

Question 313230: Express tan 225 degrees as a function of a positive acute angle
Click here to see answer by rapaljer(4667)

Question 313256: solve for x: x^2+6x+5>10
Click here to see answer by stanbon(57347)

Question 313247: i cant find the measure of angle a the measurements are 6.4 and 15.1
Click here to see answer by Alan3354(30993)

Question 313257: The inverse of COS X is a function. The domain of Cos x could be

Click here to see answer by Fombitz(13828)

Question 313258: The question is
Solve 2sin^2theta = 1 over 0 < theta < 2pi

Give your answer in radians
Click here to see answer by Fombitz(13828)

Question 313338: if tan A = 4/3 and tan B=12/5. find cos (A-B)
given 0< A < B < pie/2
Click here to see answer by Theo(3464)

Question 313336: if tan A = 4/3 and tan B=12/5.find cos (A-B)
given 0< A
Click here to see answer by Fombitz(13828)

Question 313335: if tan A = 4/3 and tan B=12/5.find cos (A-B)

Click here to see answer by Fombitz(13828)

Question 313419: how do i solve the equation using the square in h^2-4h-7=0
Click here to see answer by nerdybill(6958)

Question 313671: verify the trigonometric identity.
(sinx)(secx-cscx)-tanx= -1
Click here to see answer by texttutoring(324)

Question 313669: verify the trigonometric identity.
(sinx)(secx-cscx)-tanx
Click here to see answer by rapaljer(4667)

Question 313657: Find the solutions to the equations. I need help solving the following.
cos(2theta)=2-2sin^2theta
Click here to see answer by Alan3354(30993)

Question 313656: Find all the solutions to the equation. I need help trying to solve the following problem.
cos(2theta)+2cos^2(theta/2)=2
Click here to see answer by Alan3354(30993)

Question 313838: In traveling three-fourths of the way around a traffic circle a car travels 0.221mi. What is the radius of the traffic circle
Click here to see answer by nerdybill(6958)

Question 313909: How many distinct triangles can be formed if angle A=30, side b=12 and side a=8?
Click here to see answer by rapaljer(4667)

Question 314056: an airplane is flying an altitude of 10,000 feet. the pilot wants to make a smooth decent to the runway at a constant angle of 4 degrees. how far from the runway should the pilot begin the decent? njdevils1129@gmail.com
Click here to see answer by Alan3354(30993)

Question 314066: solve 4cos^2x-3=0 for all real values of x
Click here to see answer by Fombitz(13828)

Question 314148: what is the measure, in radians, of a central angle formed by cutting a circular pizza into twelve equal wedge shaped pieces?
Click here to see answer by Fombitz(13828)

Question 314150: what is the exact value of the sec(theta) if (5,2) is on the terminal side of theta in standard position?
Click here to see answer by Fombitz(13828)

Question 314160: find all values of 0(less than or equal to) theta (less than or equal to) 360 that satisfy the euation 4=5-2 tan(theta) to the nearest degree.

Click here to see answer by Fombitz(13828)

Question 314199: evaluate: sin200*cos70+cos200*sin70
a circle with a radius of 6 is inscribed in a square. if a dart is thrrown what is the probability that it lands inside the circle?
state the domain that is needed for tanx so that its inverse Arctanx is a function. determine the range of Arctanx
Click here to see answer by user_dude2008(1861)

Question 314314: What is the exact value of the sec 0 if (5,2) is on the terminal side of 0 in a standard position?
Click here to see answer by stanbon(57347)

Question 314001: What is the sine of the inverse sine of square root of 3 divided by 2? In radians and degrees.
Click here to see answer by stanbon(57347)

Question 314000: What is the sine of the inverse sine of square root of 3 divided by 2?
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Question 313995: Solve csc 240 degrees
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