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An equation is called an identity if it is valid for __________ values of the variable. The equation 2x = x + x is an algebraic identity, and the equation sin2 x + cos2 x = __________ is a
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To fill: An equation is called an identity for ___ values of variable. The equation
Answer to Problem 1E
An equation is called an identity for all values of variable. The equation
Explanation of Solution
An identity is an equation if the given identity is true for all the values of variables.
Consider an equation as given below,
The above equation is true only for a single value of x.
The value of x is,
The equation is true only for
Hence, it is not an identity.
Consider another example as given below,
The above equation is true for all values of x. Hence, the above equation is an identity.
The identities that includes either of the six trigonometric functions as sine, cosine, tangent, cotangent, secant, and cosec are called trigonometric identities.
The identity
Thus, an equation is called an identity for all values of variable. The equation
Chapter 7 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
- on donne f(x) da fonction derive dhe do fonction fcsos calcule f'(x) orans chacun des Cas sulants: 3 1) f(x)=5x-11, 2- f (x) = ->³ 3-1(x) = x² 12x +π; 4-f(x)=- 5-f(x) = 33-4x6-609)=-3x²+ 7= f(x) = x + 1.8-f(x) = 4 s-f(x) = x++ X+1 -x-1 2 I 3x-4 девоarrow_forwardThe correct answer is Ccould you show me how to do it by finding a0 and and akas well as setting up the piecewise function and integratingarrow_forwardT 1 7. Fill in the blanks to write the calculus problem that would result in the following integral (do not evaluate the interval). Draw a graph representing the problem. So π/2 2 2πxcosx dx Find the volume of the solid obtained when the region under the curve on the interval is rotated about the axis.arrow_forward
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