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Earn +20 ptsQ: Can cosine x equal -3
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Continue Learning about Algebra
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.
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