docs: slash command groups in cogs

docs/interactions/application-commands/slash-commands.mdx

@@ -119,6 +119,14 @@ Here's what the registered subcommands will look like in the Slash Command Menu:
 
 You'll notice that there's the name of the Slash Command Group and then the name of the subcommand separated by a space.
 
+:::
+
+:::info Cogs
+
+If you are looking to add Slash Command Groups to cogs, please look at our [Cogs page](../../popular-topics/cogs)!
+
+:::
+
 ## Sub-groups
 
 We've made a subcommand group, but did you know that you could create a group inside another?
@@ -143,6 +151,8 @@ The command created above can be invoked by typing `/math advanced square_root`.
 
 Whenever you're using Slash Commands, you might notice that you can specify parameters that the user has to set or can optionally set. These are called Options.
 
+Options can also include a description to provide more information. [You can learn more about Options in our documentation!](https://docs.pycord.dev/en/stable/api/application_commands.html#discord.Option)
+
 Since you want different inputs from Options, you'll have to specify the type for that Option; there are a few ways of doing this.
 
 <Tabs>

docs/popular-topics/cogs.mdx

@@ -37,6 +37,23 @@ class Greetings(commands.Cog): # create a class for our cog that inherits from c
     async def greet(self, ctx, member: discord.Member):
         await ctx.respond(f'{ctx.author.mention} says hello to {member.mention}!')
 
+    math = discord.SlashCommandGroup("math", "Spooky math stuff") # create a Slash Command Group called "math"
+    advanced_math = math.create_subgroup(
+        "advanced",
+        "super hard math commands!"
+    )
+
+    @math.command()
+    async def add(self, a: int, b: int):
+        c = a + b
+        await ctx.respond(f"{a} + {b} is {c}.")
+
+    @advanced_math.command()
+    async def midpoint(self, x1: float, y1: float, x2: float, y2: float):
+        mid_x = (x1 + x2)/2
+        mid_y = (y1 + y2)/2
+        await ctx.respond(f"The midpoint between those coordinates is ({mid_x}, {mid_y}).")
+
     @commands.Cog.listener() # we can add event listeners to our cog
     async def on_member_join(self, member): # this is called when a member joins the server
     # you must enable the proper intents