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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
What is the cosine of 5 pi over 12?
Converting radian into degree:
5π/12 radian = {(5π x 180)/(12 x π)}o = 75o
So, cos(5Ï€/12) is equivalent to cos75o and cos 75o = 0.92175126972.
What is csc A if cos A equals 0.6?
cos A=3/5
sin=square root of (1-cos2)
sin=square root of (1-3/52)
sin=square root of (1-9/25)
sin=square root of (16/25)
sin=4/5
csc=1/sin
csc=1/(4/5)
csc=5/4
What is a seven sided figure called?
In geometry, a heptagon is a polygon with seven sides and seven angles.
How much concrete will i need to cover 65 square meters by 1 centimeter in depth?
65 square meters times 0.01 meters (one centimeter) equals 0.65 cubic meters.
It is (5*pi/6)*8 = 20*pi/3 m.
If side a equals 76.4 ft and side b equals 39.3 ft what is the measure of angle A?
I will assume that this is a right triangle and neither side length is the hypotenuse.
In the case that this is a right triangle and neither side length given is for the hypotenuse, you would use tangent to solve for your angle measure.
tan(Q) = the length of the side opposite of Q/the length of the side adjacent to Q.
So for this answer:
**NOTE: Side a is traditionally the side opposite to angle A.**
tan(A) = a/b *where b is not the hypotenuse
=>
tan(A) = 76.4/39.3
tan(A) = 1.94402...
A = arctan(1.94402...) *arctan is the same thing as inverse tangent or tan^(-1)
A ~= 62.78 Degrees * ~= means approximately.
***Extra stuff:
tan = opposite/adjacent
sin = opposite/hypotenuse
cos = adjacent/hypotenuse
Why do cosine to the negative 1th power and cosine cancel out each other?
Cosine to the negative first power and cosine cancel each other out because cosine to the negative first power is one over cosine, and one over anything times anything is just one.
How can you prove that the line between to points is a tangent of the smaller circle?
Step I: Show that both points are outside the smaller circles. Possibly by showing that distance from each point to the centre of the circle is greater than its radius.
Step 2: Show that the line between the two points touches the circle at exactly one point. This would be by simultaneous solution of the equations of the line and the circle.
What are the qualification to susses in the bu-sines world?
One important qualification is to be able to communicate well and to do that you need to be able to spell correctly.
success.
business.
How do you convert surveyors elevations on the blueprints to feet?
1 meter is 3.28 feet. For instance, if your elevation is 60.38 meters, it means that it is 60.38 by 3.28 = 198.10 feet
If you have an angle then the length of the side OPPOSITE that angle divided by the length of the HYPOTENUSE. (O/H)
(HYPOTENUSE is the side opposite the 90 degree angle)
or (y/x)
and a lot of other cool ways.
Can you integrate -cos x plus c?
Why not? Just a second integration. Drop the constant.
int[- cos(x)] dx
the negative implies - 1 and can be brought out side the integrand
- int[cos(x)] dx
= - sin(x) + C
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Fourier analysis began with trying to understand when it was possible to represent general functions by sums of simpler trigonometric functions.
The attempt to understand functions (or other objects) by breaking them into basic pieces that are easier to understand is one of the central themes in Fourier analysis.
Fourier analysis is named after Joseph Fourier who showed that representing a function by a trigonometric series greatly simplified the study of heat propagation.
If you want to find out more, look up fourier synthesis and the fourier transform.
