Trigonometric identities reference chart for students and educators.

The image you uploaded is a reference sheet of trigonometric identities and formulas — it does not contain a specific problem to solve.

Since there’s no actual question or task in the image (just a list of formulas), I cannot solve a problem from it.

However, if you meant to ask something like:

> “Use these formulas to simplify sin(2x) + cos(2x)”
> or
> “Prove that tan(x) = sin(x)/cos(x) using the reciprocal identities”
> or
> “Find sin(15°) using half-angle formulas”

— then please tell me exactly what you’d like me to do with these formulas!

But as it stands…

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Final Answer:
There is no problem to solve — this is a formula reference sheet. Please provide a specific question or expression to simplify, prove, or calculate using these identities.