address review and fix test failures

Author: LorrensP-2158466

library/std/src/num/f32.rs

@@ -752,9 +752,9 @@ impl f32 {
     /// let f = std::f32::consts::FRAC_PI_4;
     ///
     /// // asin(sin(pi/2))
-    /// let abs_difference = (f.sin().asin() - std::f32::consts::FRAC_PI_2).abs();
+    /// let abs_difference = (f.sin().asin() - f).abs();
     ///
-    /// assert!(abs_difference <= 1e-1);
+    /// assert!(abs_difference <= 1e-6);
     /// ```
     #[doc(alias = "arcsin")]
     #[rustc_allow_incoherent_impl]
@@ -1095,7 +1095,7 @@ impl f32 {
     ///
     /// let abs_difference = (f - x).abs();
     ///
-    /// assert!(abs_difference <= 1e-6);
+    /// assert!(abs_difference <= 1e-5);
     /// ```
     #[doc(alias = "arccosh")]
     #[rustc_allow_incoherent_impl]

library/std/src/num/f64.rs

@@ -752,9 +752,9 @@ impl f64 {
     /// let f = std::f64::consts::FRAC_PI_4;
     ///
     /// // asin(sin(pi/2))
-    /// let abs_difference = (f.sin().asin() - std::f64::consts::FRAC_PI_2).abs();
+    /// let abs_difference = (f.sin().asin() - f).abs();
     ///
-    /// assert!(abs_difference < 1e-7);
+    /// assert!(abs_difference < 1e-14);
     /// ```
     #[doc(alias = "arcsin")]
     #[rustc_allow_incoherent_impl]