The curve equation is and the point is
.
The slope of the tangent line is equal to the derivative of the function at .
Apply derivative on each side with respect to .
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Derivative of constants: .
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Derivative of inverse trigonometric function: .
The slope of the tangent line is .
Substitute in above equation.
.
Slope of the tangent line is .
Point-slope form of line equation is .
Substitute and
in the above equation.
The equation of the tangent line is .
The equation of the tangent line is .