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What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

Angles 1 and 2 are complimentary angles. angle 1 = 52 degrees. what is the measure of angle 2?

Circle a has center of (2,3) and a radius of 5 and circle b has a center of (1,4) and a radius of 10. what steps will show that circle a is similar to circle b 1) dilate circle a by a scale factor of 2 2) translate circle a using the rule (x+1,y-1) 3) rotate circle a 180 degrees about the center 4) reflect circle a over the y-axis