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...Chapter derivatives by the chain rule you remember that derivative of f x g is not df dx dg sin times cos product gave two terms one term but there another way combining sine function and squaring into a single new does involve cosine with certain twist we will first explain then find for its may i say here important it easy to learn use often see as third basic functions from old so far are xn still ahead ex log when added multiplied come sum this section combines in created out original if composite start jindf gives y produces z inside input outside called composition starts ends sometimes written fog circle shows difference an ordinary fg more other examples on calculator push button compute every most calculators they used order figure la how stretch squeeze chaln graph crazy fm signal frequency modulated wave goes up down like at same places changing moves peaks left right compare which am amplitude remark usually different off opposite something apply result sinx save parenthese...