- Give the exact value of the expression without using a calculator. cos(arctan(-7))?

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Use a sum or difference formula to write a formula for cos^2x. Express the result in terms of sinx and cos2x? NaA is a salt containing a weak base A- ; Kb=1.8*10^-5; pH of 1.2 M NaA? Porque la mutacion se considera un factor benefico para la variacion genotipica? Is this answer right-math help? Ghost Hunters or Ghost Adventures?