If y = sin x:
x can take on any value, so the domain is the set of real numbers.
y can take on values between -1 and 1 (including the extremes); so the range is -1 <= y <= 1.
If y = sin x:
x can take on any value, so the domain is the set of real numbers.
y can take on values between -1 and 1 (including the extremes); so the range is -1 <= y <= 1.
If y = sin x:
x can take on any value, so the domain is the set of real numbers.
y can take on values between -1 and 1 (including the extremes); so the range is -1 <= y <= 1.
If y = sin x:
x can take on any value, so the domain is the set of real numbers.
y can take on values between -1 and 1 (including the extremes); so the range is -1 <= y <= 1.
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If y = sin x:
x can take on any value, so the domain is the set of real numbers.
y can take on values between -1 and 1 (including the extremes); so the range is -1 <= y <= 1.
Domains and ranges are commonly used in fields such as mathematics, computer science, economics, physics, and engineering. In mathematics, domains and ranges help define the inputs and outputs of functions, which are essential for solving equations and analyzing data. In computer science, domains and ranges are used in programming to determine the scope and limits of variables and functions. In economics, domains and ranges help model relationships between variables in economic systems. In physics and engineering, domains and ranges are crucial for understanding the behavior of physical systems and designing solutions based on specific input-output relationships.
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(1-cosx)/sinx + sinx/(1- cosx) = [(1 - cosx)*(1 - cosx) + sinx*sinx]/[sinx*(1-cosx)] = [1 - 2cosx + cos2x + sin2x]/[sinx*(1-cosx)] = [2 - 2cosx]/[sinx*(1-cosx)] = [2*(1-cosx)]/[sinx*(1-cosx)] = 2/sinx = 2cosecx
sinx cscx = 1 is the same thing as sinx(1/sinx) = 1 which is the same as sinx/sinx = 1. This evaluates to 1=1, which is true.
From the Pythagorean identity, sin2x = 1-cos2x. LHS = 1/(sinx cosx) - cosx/sinx LHS = 1/(sinx cosx) - (cosx/sinx)(cosx/cosx) LHS = 1/(sinx cosx) - cos2x/(sinx cosx) LHS = (1- cos2x)/(sinx cosx) LHS = sin2x /(sinx cosx) [from Pythagorean identity] LHS = sin2x /(sinx cosx) LHS = sinx/cosx LHS = tanx [by definition] RHS = tanx LHS = RHS and so the identity is proven. Q.E.D.