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What does cos squared x - Sin squared x equal?
2 x cosine squared x -1 which also equals cos (2x)
Why does cos negative theta equal cos postitive theta?
The cosine is simply the x-coordinate of the unitary circle. It helps to draw the circle, and the sine and cosine (x and y coordinates), to visualize this. The y-coordinate is the same for a positive angle and for the corresponding negative angle.
What is the difference between an algebraic expression and an equation?
Equation: x+3=3+x (notice the equal sign: equal; equation)Expression: x+3 (notice no equal sign)
Example of the difference between equation and an expression?
Equation: x+3=3+x (notice the equal sign: equal; equation)Expression: x+3 (notice no equal sign)
What does 86.82 x 10 3 equal?
86.82 x 10^3 is equal to 86,820.
What is the period of the cosine function y is equal to 3 cos x?
y=3cos(x) peroid is 2pie
Does tangent of x equal cosine divided by sine?
No, it does not.
Why does cosine x equal cosine negative x?
This is going to require some visualization. Cosine is defined as the x-value on the unit circle. If you picture where a point would be, for example, at the angle of pi/6 (30°) you get a coordinate of (√(3)/2 , 1/2) so cosine is √(3)/2 and sine is 1/2 To find a negative angle you take the reflection across the x-axis. Since this does not chance the x-value, only the y, cosine does not change. The coordinates of -(pi/6) (-30°) are (√(3)/2 , -1/2). cos(-x) = cos(x) sin(-x) = - sin(x)■
How do you get a period of 3 in a cosine function?
The argument of the cosine function must be (2pi/3)*x radians
Can you make cosine squared X divided by2 equal to cosine squared x with some constant?
You could just pull out the half: it will be (1/2) cos squared x.
What is the answer to cosine x equal to negative one?
cosine(x) = -1x = (270 + 360N) degreesorx = (1.5 + 2N) pi radiansN is any integer, positive or negative.
What does sine times cosine equal?
Sin(x) cos(x) = 1/2 of sin(2x)
What is the integral of cosine cubed?
The integral of cosine cubed is sinx- 1/3 sin cubed x + c
Is 2 cosine x the same as cosine squared x?
No
What does cos squared x - Sin squared x equal?
2 x cosine squared x -1 which also equals cos (2x)
Is x the cosine in math?
No, actually x is the variable in mathematics. cos(x) or cosine is considered a trigonometric function with a variable x.
Explain why ecosx is less than equal to 3 for all real x?
The cosine (cos) function gives a value -1 ≤ cos(x) ≤ 1 for any real xe is a constant approximately equal to 2.7therefore, by the rules of algebraic inequalities:-1 ≤ cos(x) ≤ 1-e ≤ ecos(x) ≤ ealso,e < 3therefore:-e ≤ ecos(x) ≤ e < 3-e ≤ ecos(x) < 3which gives:ecos(x) < 3
