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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
The cosine of 0.57 degrees is 0.999951. The cosine of 0.57 radians is 0.841901
What is cosine of 23 degree angle?
This can be done on a graphing calculator by making sure you have your calculator in degrees mode, and then tentering the cos(23). You get an answer of 0.9205048535.
It is 679 square metres.
What is the point of graphing a trig function (sin cos etc.)?
The functions are periodic and so, given any value (within the range) the function can take the value several times, Graphing the function can help you determine secondary points at which the function takes a given value.
Can you give examples of phenomena that take on a series of values over and over again?
The sea level as the tide goes in and out. An oscillating spring.
A vibrating string.
How does an increase in eccentricity affect the shape of a hyperbola?
Hyperbolae with different eccentricities have a different angle between their asymptotes.
How do you work out the remaining side of a right angled triangle using theta and one side?
Suppose triangle ABC is right angled at C. Suppose you are given that the angle at B is theta. Then
if you know the length of AB (the hypotenuse), then
BC = AB*cos(theta) and
AC = AB*sin(theta)
if you know the length of BC, then
AB = BC/cos(theta) and
AC = BC*tan(theta)
if you know the length of AC, then
AB= AC/sin(theta) and
BC = AC/tan(theta)
What is the standard position of 790?
The standard position of 790 degrees is 70 degrees anticlockwise from the positive x-axis.
How do I find Sin A .42 is A is an acute angle. And how do i enter that on a calculator?
If sin(A) = 0.42 then A = arcsin(0.42).
On calculators, the arcsin key is usually reached by using another key before the sin key, and is shown as "sin to the power -1".
Make sure that your calculator is set to degrees rather than radians (to check this, try sin(90). If the answer is 1 the calculator is in degree mode; if it is 0.8940 it is in radian mode.
Yes, because an isosceles triangle has two equal base angles and two equal sides.
a) sine
What is a vertices of the triangle?
The apex Points of a triangle are called as vertices or else the points where two line segments meet is called as Vertices.
What is sec theta if tan theta equals 2 with theta in quadrant 3?
If tan theta equals 2, then the sides of the triangle could be -2, -1, and square root of 5 (I used the Pythagorean Theorem to get this). From this, sec theta is negative square root of 5. It is negative because theta is in the third quadrant, where cosine, secant, sine, and cosecant are all negative.
What is the ratios function of sin?
The sine of an angle in a right triangle is the ratio of the length of the side opposite the angle to the length of the hypotenuse.
In terms of ratios, the sine of an angle is defined, in a right angled triangle, as the ratio of lengths of the opposite side to the hypotenuse.
Find the value of a if tan 3a is equal to sin cos 45 plus sin 30?
If tan 3a is equal to sin cos 45 plus sin 30, then the value of a = 0.4.
What is the cos of angle a 5 13 12?
It is: cos = adj/hyp and the acute angles for the given right angle triangle are 67.38 degrees and 22.62 degrees
What is the difference between abtuse and acute?
An obtuse angle does have a measure of over 90 degrees but it is also less than 180 degrees.
What is the contribution of batholomaeus pitiscus in trigonometry?
Bartholomaeus Pitiscus is best known for his book called Trigonometria which was first published in Heidelburg in 1595. It consists of work on plane and spherical trigonometry. The book had the first recorded mention of the word "trigonometry".
How much larger is the supplement of a 57 degree angle than the complement of a 75 degree angle?
The supplementary angle of 57 degrees is 123 degrees
The complementary angle of 75 degrees is 15 degrees
So: 123 minus 15 = 108 degrees
phi = [(1+sqrt(5)]/2 = 1.6180, the golden ratio.
cosine(phi) = -0.0472 approx.
