A cross section of a rectangular pyramid is made perpendicular to the base and through the vertex as shown. What is the area of the cross section?

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

If angle 2=3x +1 and angle 3=2x +4what is angle 2

Just tell me how to set up the equation.