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| Name: scott Who is asking: Student Level of the question: Secondary Question: How to prove arc sin x = arc tan( (x)/√(1-x2))
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Hi Scott, Arc sin(x) is the angle whose sine is x. Hence if arc sin(x) = t then sin(t) = x. Think of the number x as x/1 then
Draw a diagram to represent this.
Use Pythagoras theorem to find the length of the third side of the triangle. What's the tangent of t? Penny |
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