
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
Given the function f(x) = A sin(x + $\frac{\pi}{4}$), x ∈ R, and f(0) = 1.
1. Find the value of A.
2. If f(α) = $- \frac{1}{5}$, and α is an angle in the second quadrant, find cosα.

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