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For school trigonometry, it is used to find the angles of a triangle when only the lengths of the sides are known.

Later on, in mechanics, you may come across the decomposition of forces along and across the line of motion. In calculus you may come across it in second order differential equations.

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Which trigonometric functions are even?

Cosine and secant are even trig functions.


Why are sine and cosine functions used to describe periodic?

because sine & cosine functions are periodic.


How do you find the max and min of sine cosine functions?

The maximum of the sine and cosine functions is +1, and the minimum is -1.


How do you use cosine?

cosine = adjacent/hypotenuse. It can be used as other trig functions can.


What does cosine mean on a calculator?

The same thing that cosine means in trigonometry, a calculator just allows you to calculate such functions quickly.


What are functions in trigonometry?

The basic functions of trigonometry are: sine cosine tangent secant cosecant cotangent


What is the use of orthogonality in fourier series?

Orthogonality in Fourier series is used to simplify the representation of periodic functions as sums of sine and cosine functions. Because the sine and cosine functions are orthogonal over a defined interval, the coefficients for each term can be calculated independently. This property allows for the efficient decomposition of complex signals into simpler, non-overlapping components, making it easier to analyze and reconstruct signals in various applications, such as signal processing and communications.


What are the trigonometric functions?

The principal Trigonometric function is Sine(Sin). It has a complementary function Cosine (Cos). Bases on these two functions, are further trig. functions. they are. Tangent(Tan) = Sin /Cos Cosecant(CSC) = 1/Sin Secant (SEC) = 1/Cos Cotangent(COT) = Cos/Sin The word 'Sine' comes from Latin , and means 'curve'. Initially you learn it between 0 - 90 degrees. It is a continuous 'wave', from infinity to infinity. . The Sin/Cos functions only range from -1 to 1 through '0'. The Tan function ranges from negative infinity to positive infinity, through '0'. For a triangle inscribed in a circle. At the circles centre, the radius may be '1' unit. If the radius is angles at 30 degrees from the horizontal(x) axis, then the vertical (opposite) lines perpendicular height of the triangle is exactly '1/2' ( 0.5), compared to the radius. Hence the Sin( 30 degrees) is opposite / radius(hypotenuse) = (1/2)/1 = 1/2 All the othesr trig. functional answer are based on moving the radius from horizontal to vertical. with in the described circle. This is why it produces , such 'horrible' decimal figures. Have a look in Castle's Four Figures Tables, rather than using a pocket calculator, and also graphs of the Sine/Cosine and Tangent curves.


What are circular functions?

Sine, Cosine, Tangent, Cotangent, secant and cosecant


What is difference of using sine to cosine and tangent?

They are different trigonometric functions!


Advantages of sine and cosine functions?

Advantages of sine and cosine functions are in developing or creating plane analytic geometry. These functions are also beneficial in developing complex number plane, emphasizing scaling, rotation and reflection symmetries. which complement vertical and horizontal shifts.


What is cos 66.5 degrees?

The cosine of 66.5 degrees is approximately 0.4067. This value can be found using a scientific calculator or trigonometric tables. Cosine functions are used to determine the adjacent side of a right triangle relative to the hypotenuse. In practical applications, this value is often used in various fields such as physics, engineering, and computer graphics.