- Calc 3 Question?

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What is [1/cos(x)-sin(x) times tan(x)]/cosĀ²(x)? Found in the bladder lining peculiar cell that slide over one another? W^44 + w^45 = ? Options : A)-1 B)-1/w C) 1/(-w^2) or none.
I know that w^3 = 1 the answer is c...how? If a and b are positive integers such that gcd(a,b)=210, lcm[a,b]=210^3, and a** **What is the appropriate pressures of an air conditioning unit on an 90-degree day?