exam Maths Puzzle Numerical Ability

Can you answer this problem for me? It is so long, and I just keep getting stuck. It has to do with the trigonometric identities. The instructions are to verify the identity. Here

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exam Other Question

This is a word problem.

1. The number of people employed in the U.S. as medical assistants was 757 thousand in 2000. By the year 2010, this number is expected to rise to 1052 th Can you please help me with this problem? 25x^2-4/49 factor out completely or state that it is prime.