KAS recognizes equivilient trig functions

[nixterrimus]

Summary:

WIP

Issue: https://khanacademy.atlassian.net/browse/LC-1647

Test plan:

[github-actions]

Size Change: 0 B

Total Size: 812 kB

ℹ️ View Unchanged

Filename	Size
packages/kas/dist/es/index.js	38.1 kB
packages/kmath/dist/es/index.js	4.27 kB
packages/math-input/dist/es/index.js	79 kB
packages/perseus-core/dist/es/index.js	908 B
packages/perseus-editor/dist/es/index.js	263 kB
packages/perseus-error/dist/es/index.js	877 B
packages/perseus-linter/dist/es/index.js	21.8 kB
packages/perseus/dist/es/index.js	388 kB
packages/pure-markdown/dist/es/index.js	3.77 kB
packages/simple-markdown/dist/es/index.js	12.4 kB

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