- Describe how the law of conservation of mass could be useful for investigating chemical changes?

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sin(theta)/1-cos(theta)=cot(theta) + csc(theta) *I keep getting cos(theta)+1/sin(theta) instead of minus -1? Does it really matter what shape the Earth is? I am really bad at calculus. Would it be best to take AP Stats over AP Calc A/B? I really need help with this question (chemistry)? Can I take GasX after taking Percocet? I have an upset stomach?