diff --git a/src/ragged/_spec_elementwise_functions.py b/src/ragged/_spec_elementwise_functions.py
index ba07e34..3357c6c 100644
--- a/src/ragged/_spec_elementwise_functions.py
+++ b/src/ragged/_spec_elementwise_functions.py
@@ -1156,8 +1156,7 @@ def sign(x: array, /) -> array:
     https://data-apis.org/array-api/latest/API_specification/generated/array_api.sign.html
     """
 
-    assert x, "TODO"
-    assert False, "TODO 100"
+    return _box(type(x), np.sign(*_unbox(x)))
 
 
 def sin(x: array, /) -> array:
@@ -1177,8 +1176,7 @@ def sin(x: array, /) -> array:
     https://data-apis.org/array-api/latest/API_specification/generated/array_api.sin.html
     """
 
-    assert x, "TODO"
-    assert False, "TODO 101"
+    return _box(type(x), np.sin(*_unbox(x)))
 
 
 def sinh(x: array, /) -> array:
@@ -1201,8 +1199,7 @@ def sinh(x: array, /) -> array:
     https://data-apis.org/array-api/latest/API_specification/generated/array_api.sinh.html
     """
 
-    assert x, "TODO"
-    assert False, "TODO 102"
+    return _box(type(x), np.sinh(*_unbox(x)))
 
 
 def square(x: array, /) -> array:
@@ -1223,8 +1220,7 @@ def square(x: array, /) -> array:
     https://data-apis.org/array-api/latest/API_specification/generated/array_api.square.html
     """
 
-    assert x, "TODO"
-    assert False, "TODO 103"
+    return _box(type(x), np.square(*_unbox(x)))
 
 
 def sqrt(x: array, /) -> array:
@@ -1243,8 +1239,7 @@ def sqrt(x: array, /) -> array:
     https://data-apis.org/array-api/latest/API_specification/generated/array_api.sqrt.html
     """
 
-    assert x, "TODO"
-    assert False, "TODO 104"
+    return _box(type(x), np.sqrt(*_unbox(x)))
 
 
 def subtract(x1: array, x2: array, /) -> array:
@@ -1266,9 +1261,7 @@ def subtract(x1: array, x2: array, /) -> array:
     https://data-apis.org/array-api/latest/API_specification/generated/array_api.subtract.html
     """
 
-    assert x1, "TODO"
-    assert x2, "TODO"
-    assert False, "TODO 105"
+    return _box(type(x1), np.subtract(*_unbox(x1, x2)))
 
 
 def tan(x: array, /) -> array:
@@ -1288,8 +1281,7 @@ def tan(x: array, /) -> array:
     https://data-apis.org/array-api/latest/API_specification/generated/array_api.tan.html
     """
 
-    assert x, "TODO"
-    assert False, "TODO 106"
+    return _box(type(x), np.tan(*_unbox(x)))
 
 
 def tanh(x: array, /) -> array:
@@ -1315,8 +1307,7 @@ def tanh(x: array, /) -> array:
     https://data-apis.org/array-api/latest/API_specification/generated/array_api.tanh.html
     """
 
-    assert x, "TODO"
-    assert False, "TODO 107"
+    return _box(type(x), np.tanh(*_unbox(x)))
 
 
 def trunc(x: array, /) -> array:
@@ -1334,5 +1325,4 @@ def trunc(x: array, /) -> array:
     https://data-apis.org/array-api/latest/API_specification/generated/array_api.trunc.html
     """
 
-    assert x, "TODO"
-    assert False, "TODO 108"
+    return _box(type(x), np.trunc(*_unbox(x)))
diff --git a/tests/test_spec_elementwise_functions.py b/tests/test_spec_elementwise_functions.py
index f803e87..1ec6161 100644
--- a/tests/test_spec_elementwise_functions.py
+++ b/tests/test_spec_elementwise_functions.py
@@ -640,3 +640,84 @@ def test_round_complex(device, x_complex):
     assert result.shape == x_complex.shape
     assert xp.round(first(x_complex)) == first(result)
     assert xp.round(first(x_complex)).dtype == result.dtype
+
+
+@pytest.mark.parametrize("device", devices)
+def test_sign(device, x):
+    result = ragged.sign(x.to_device(device))
+    assert type(result) is type(x)
+    assert result.shape == x.shape
+    assert xp.sign(first(x)) == first(result)
+    assert xp.sign(first(x)).dtype == result.dtype
+
+
+@pytest.mark.parametrize("device", devices)
+def test_sin(device, x):
+    result = ragged.sin(x.to_device(device))
+    assert type(result) is type(x)
+    assert result.shape == x.shape
+    assert xp.sin(first(x)) == pytest.approx(first(result))
+    assert xp.sin(first(x)).dtype == result.dtype
+
+
+@pytest.mark.parametrize("device", devices)
+def test_sinh(device, x):
+    result = ragged.sinh(x.to_device(device))
+    assert type(result) is type(x)
+    assert result.shape == x.shape
+    assert xp.sinh(first(x)) == pytest.approx(first(result))
+    assert xp.sinh(first(x)).dtype == result.dtype
+
+
+@pytest.mark.parametrize("device", devices)
+def test_square(device, x):
+    result = ragged.square(x.to_device(device))
+    assert type(result) is type(x)
+    assert result.shape == x.shape
+    assert xp.square(first(x)) == first(result)
+    assert xp.square(first(x)).dtype == result.dtype
+
+
+@pytest.mark.parametrize("device", devices)
+def test_sqrt(device, x):
+    result = ragged.sqrt(x.to_device(device))
+    assert type(result) is type(x)
+    assert result.shape == x.shape
+    assert xp.sqrt(first(x)) == pytest.approx(first(result))
+    assert xp.sqrt(first(x)).dtype == result.dtype
+
+
+@pytest.mark.parametrize("device", devices)
+def test_subtract(device, x, y):
+    result = ragged.subtract(x.to_device(device), y.to_device(device))
+    assert type(result) is type(x) is type(y)
+    assert result.shape in (x.shape, y.shape)
+    assert xp.subtract(first(x), first(y)) == first(result)
+    assert xp.subtract(first(x), first(y)).dtype == result.dtype
+
+
+@pytest.mark.parametrize("device", devices)
+def test_tan(device, x):
+    result = ragged.tan(x.to_device(device))
+    assert type(result) is type(x)
+    assert result.shape == x.shape
+    assert xp.tan(first(x)) == pytest.approx(first(result))
+    assert xp.tan(first(x)).dtype == result.dtype
+
+
+@pytest.mark.parametrize("device", devices)
+def test_tanh(device, x):
+    result = ragged.tanh(x.to_device(device))
+    assert type(result) is type(x)
+    assert result.shape == x.shape
+    assert xp.tanh(first(x)) == pytest.approx(first(result))
+    assert xp.tanh(first(x)).dtype == result.dtype
+
+
+@pytest.mark.parametrize("device", devices)
+def test_trunc(device, x):
+    result = ragged.trunc(x.to_device(device))
+    assert type(result) is type(x)
+    assert result.shape == x.shape
+    assert xp.trunc(first(x)) == first(result)
+    assert xp.trunc(first(x)).dtype == result.dtype