exam Maths Puzzle Numerical Ability

Please help me with this problem.
Find an expression that completes the identity.
(2sin^2(x)+cos2(x))/(sec(x)) = ??

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exam Other Question

Your parents want to start a college fund for you. they plan to deposit money in an account that pays 2% annual interest compounded monthly. how much should they deposit so that th Definition: If y is a real number, then y to 1st power = _______