Add tolerance to the CSS Math Functions tan() WPT tests

Change-Id: I4956dc967e743cb88ce837c4063141fdece2b298
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5033769
Reviewed-by: Steinar H Gunderson <sesse@chromium.org>
Commit-Queue: Daniil Sakhapov <sakhapov@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1225441}
diff --git a/css/css-values/sin-cos-tan-computed.html b/css/css-values/sin-cos-tan-computed.html
index 6cf4f19..a19b118 100644
--- a/css/css-values/sin-cos-tan-computed.html
+++ b/css/css-values/sin-cos-tan-computed.html
@@ -13,9 +13,9 @@
 test_math_used('cos(0)', '1', {type:'number'});
 test_math_used('sin(0)', '0', {type:'number'});
 test_math_used('tan(0)', '0', {type:'number'});
-test_math_used('tan(315deg)', '-1', {type:'number'});
-test_math_used('tan(360deg)', '0', {type:'number'});
-test_math_used('tan(405deg)', '1', {type:'number'});
+test_math_used('tan(315deg)', '-1', {type:'number', approx:0.1});
+test_math_used('tan(360deg)', '0', {type:'number', approx:0.1});
+test_math_used('tan(405deg)', '1', {type:'number', approx:0.1});
 
 // Test pi
 test_math_used('calc(sin(pi/2 - pi/2) )', '0', {type:'number', approx:0.1});