Prove that arc sinx + arc cosx = arc tan [xy+{(1-x^2)(1-y^2)}^1/2]/[y{(1-x^2)}^1/2 -x{(1-y^2)}^1/2]
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Hello tariq_h_tauheed Originally Posted by tariq_h_tauheed Prove that arc sinx + arc cosx = arc tan [xy+{(1-x^2)(1-y^2)}^1/2]/[y{(1-x^2)}^1/2 -x{(1-y^2)}^1/2] I'm sure you mean . So let . Then Grandad
Hello, tariq_h_tauheed! Another approach . . . Prove that: . Let: . Then we have: . .[1] The left side is: . Take the tangent: . .[2] Substitute [1] into [2]: . Multiply top and bottom by . . . Therefore: .
Thanks a ton...
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