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Trigonometry
Trigonometry is a field of mathematics. It is the study of triangles. Trigonometry includes planar trigonometry, spherical trigonometry, finding unknown values in triangles, trigonometric functions, and trigonometric function graphs.
3,810 Questions
How can you illustrate the definition of a circle?
A circle is a shape with a circumference of 360 degrees.
What is the formula for cone volume?
1/3 pi times r2 times height
that's the closest I could get on this thing
Where are angles used in real life?
They are ued all over the place for Ex. TV, oven, shelves, pizza, windows, mirrors, shoeboxes, and amything else like that.
If the sun is hitting a pole at 30 degrees altitude and the pole is 3' tall how long is the shadow?
If the pole is on level ground then you have the outline of a right angled triangle with an opposite side of 3 feet and an adjacent angle of 30 degrees. To find the length of the adjacent side (which in effect is the shadow of the pole) use the tangent ratio: tangent = opposite/adjacent which can be rearranged to: adjacent = opposite/tangent adjacent = 3/tangent 30o = 5.196152423 feet Therefore the shadow cast by the pole is 5.2 feet corrected to one decimal place.
How do you use the discriminant to find the number and type of zeros of a function?
If the discriminant is positive, then the function has two real zeros. If it is zero, then the function has one real zero. If it is negative, then it has two complex conjugate zeros.
This assumes that we are talking about a standard second order polynomial equation, i.e. quadratic equation, in the form Ax2 + Bx + C = 0, and that the discriminant is B2 - 4AC, which is a part of the standard solution of these kind of equations.
How do you find direction of a vector?
Consider the space defined by orthogonal unit vectors iand j. Let ai + bj be a vector in that space. Its direction is arctan(b/a) provided a � 0. If a � 0, the direction is pi/2 radians (or in the jdirection).
Angles are measured from the positive direction of the iaxis in the anticlockwise direction.
Should you take trigonometry before calculus?
Why? These are two topics within Mathematics. They are not isolated, mutually-insular academic disciplines. Having said that, basic Trigonometry is simpler than Calculus, which requires the deeper grounding in algebra and the graphs of algebraic functions based on x^n where the index n is at least 2 (quadratic and higher-order equations) . At a more advanced level, all three topics merge when you apply calculus to trigonometrical functions.
Many times, calculus classes will expect some basic knowledge of trigonometry. While it may not be too hard to learn in the class, you may feel better prepared if you have taken trigonometry or a pre-calculus class.
How do you find the gradient of the curve y equals x-4 over x when y equals 3?
y = x - 4/x
so gradient = dy/dx = 1 + 4/x2
When y = 3, x - 4/x = 3
x2 - 3x - 4 = 0 so x = -1 or x = 4
When x = -1, gradient = 1 + 4/(-1)2 = 1 + 4/1 = 1+4 = 5
When x = 4, gradient = 1 + 4/(4)2 = 1 + 4/16 = 1+1/4 = 1.25
tan (theta x theta) : must square the value of the angle, theta, before applying the trig function, tangent.
If rank of the matrix is equal to no of variable then it have?
Then it has (not have!) a unique solution.
What are 2 mathematical things about the number 9?
The number nine is a composite number (3 x 3 = 9) and it is a square number (32 = 9). It is a divisor of any number that has digits having the sum of nine or a multiple of 9 (For example, the digits in 367,218 add up to 27, which is a multiple of 9, and the digits in 27 also add up to 9)
What is represented by capital letters angle or side?
Angles are represented by capital letters. Small letters refer to sides.
What is the frequency of a sine wave with a period of 2 ms?
The definiton of period (T) . Is T = 1/f ; Therefore if you know that the period is 2.5
What is a 3 dimensional figure that 2 triangular faces and 3 rectangular faces?
A triangular prism
(Two triangles as the two bases)
It is 1.
