
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Rowena has a very long, level backyard. From a particular point, she determines that the angle of elevation to a large tree in her backyard is \(15^{\circ}\). She moves \(40 \mathrm{~m}\) closer and determines that the new angle of elevation is \(30^{\circ}\). How tall, in metres, is the tree?

Present the answer in LaTex format: \boxed{Your answer}
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