keyword

trig textbook

Monthly search volume and cost-per-click data for "trig textbook" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=trig+textbook&country=us" +--------------+------------------+ | volume | 390 | | cpc | $0.47 | | competition | 0.97 | | country | US | | updated | 2026-05-27 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
trigonometry textbook	1,300	$0.39	9/20
trigonometric book	480	$0.46	12/20
trig book	480	$0.46	11/20
trigonometry book	480	$0.58	10/20
trigonometry textbooks	390	$0.47	12/20
online trig textbook	30	$6.66	11/20
trigonometry book online	30	$6.66	11/20
trigonometry online textbook	30	$6.66	11/20
online trigonometry textbook	30	$0	10/20
trigonometry textbook online	30	$6.66	10/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://app.seodata.dev/v1/keyword?q=trig+textbook&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 1,000/month

Full API spec: llms.txt