![]() If you know that sin x=0.5, you can't reverse this to discover x as there are infinitely many angles with sine 0.50.5. Of course, there are many angles with the same sine, so the sine function doesn't actually have an inverse that reliably "undoes'' the sine function. 4.9: Inverse Trigonometric Functions The trigonometric functions frequently arise in problems, and often it is necessary to invert the functions, for example, to find an angle with a specified sine. ![]() By using implicit differentiation, we can find the equation of a tangent line to the graph of a curve.
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