---
title: "PC.AGR.4: Trigonometric Identities and Equations (Georgia Mathematics standard)"
code: PC.AGR.4
cite_as: Georgia Standards of Excellence, Mathematics, PC.AGR.4
subject: math
grades:
  - high-school
language: en
canonical_url: https://georgiahomeroom.org/standards/code/PC.AGR.4
md_url: https://georgiahomeroom.org/standards/code/PC.AGR.4.md
alternate_language_url: https://georgiahomeroom.org/es/standards/code/PC.AGR.4.md
source_url: https://case.georgiastandards.org/ims/case/v1p1/CFDocuments/e9dd7229-3558-4df2-85c6-57b8938f6180
source_last_changed: 2024-10-09
data_built: 2026-09-18
publisher: Georgia Homeroom, a free public-interest project of Georgia Civic Data. Not affiliated with or endorsed by the Georgia Department of Education or any school district.
up: https://georgiahomeroom.org/standards/math/high-school.md
index: https://georgiahomeroom.org/standards/index.md
---

# PC.AGR.4: Trigonometric Identities and Equations

Manipulate, prove, and apply trigonometric identities and equations to solve contextual mathematical problems.

- Subject: Mathematics
- Appears in: High School, https://georgiahomeroom.org/standards/math/high-school.md

## Expectations

- Verify trigonometric identities and solve trigonometric equations.
  - **PC.AGR.4.1**: Apply the fundamental trigonometric identities to simplify expressions and verify other identities.
  - **PC.AGR.4.2**: Use sum, difference, double-angle, and half-angle formulas for sine, cosine, and tangent to establish other identities and apply them to solve problems.
  - **PC.AGR.4.3**: Solve trigonometric equations arising in modeling contexts.
- Apply trigonometry to general triangles.
  - **PC.AGR.4.4**: Prove and apply the Law of Sines and the Law of Cosines to find unknown measurements in right and non-right triangles.
  - **PC.AGR.4.5**: Determine the area of an oblique triangle.

## Georgia Milestones coverage

No Georgia Milestones blueprint cites this standard.

Source: Georgia Standards of Excellence, published by the Georgia Department of Education at case.georgiastandards.org.