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Not Linear

Mathematics · Class 11

cos(A-B) != cos A - cos B. sin(A+B) != sin A + sin B. Those are the most common slips. Keep the mixed products.

mixed products
cos(A-B)=cos A cos B + sin A sin B
not cos A - cos B
NOT LINEAR: cos(A-B) != cos A - cos B. sin(A+B) != sin A + sin B. Those are the most common slips. Keep the mixe
NOT LINEAR: cos(A-B) != cos A - cos B.
WHAT — NOT LINEAR: cos(A-B) != cos A - cos B. sin(A+B) != sin A + sin B. Those are the most common slips. Keep the mixe
WHY — Why it matters: This rule is a separate learning unit inside angles and the fundamental law. It can be defined, appl
MAIN IDEA: cos(A-B) != cos A - cos B. sin(A+B) != sin A + sin B. Those are the most common slips. Keep the mixe

Right triangle — Not Linear — original sketch for this lesson (not copied from a textbook).