- How do I solve this trigonometric identity problem?

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Let a=1a=1, b=2b=2 and c=2c=2. Find the measure of angles ∠A∠A, ∠B∠B and ∠C? Have you ever been contacted or abducted by aliens from outer space? Why isnt Lutein a vitamin? If a 15ml bottle of solution contains 50mg of a chemical, and 1ml each contains 3.3 mg, how many ml would equall 1mg? A sample of 0.300 moles of nitrogen occupies 0.600 L. Under the same conditions, what amount of moles occupies 1.200 L?