Trigonometry › Inverse cosine

Teacher info
Another inverse trig function
CCSS.MATH.CONTENT.HSF.TF.B.7
(+) Use inverse functions to solve trigonometric equations that arise in modeling contexts; evaluate the solutions using technology, and interpret them in terms of the context.

LTI launch URL (help)
https://schoolyourself.org/page/lti/sy/trigonometry/inverse-cos
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