First of all, a square root cannot produce a negative number, so we know part of the range is -1<=x. At this point, when calculating it further, we only need the part inside the radical, or 1-x^2. Just by …

Substitute cos (2x) = 2cos^2 (x)-1 Use the quadratic formula on the resulting equation. Use the inverse cosine function on the two cases. Add the periodic nature of the function.

See explanation. Domain The domain is the largest subset of real numbers RR for which the function is defined. To find it we have to look for any possible values of x for which the function is undefined. …

We have #f:RR->RR,f (x)=root (3) (x^2+mx+1)#.Which are values of #m# for which the graph of #f# has tangent in every point in #RR#?

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After another 6 months of not selling, it is further marked down by 10 %. Find the sale price after both markdowns? What is the general soultion to 2tan^2x + sec^2x = 2 ? How do you solve this function? …

How do you find the domain and range of #x^2+y^2=9#? How do you find the axis of symmetry, graph and find the maximum or minimum value of the function #y = –x^2 + 6x – 1#? How do you rationalize …

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