Verify the identity.sin(? - ?) cos(? + ?) = sin ? cos ? - sin ? cos ?
What will be an ideal response?
sin(? - ?) cos (? + ?) = (sin ? cos ? - cos ? sin ?)(cos ? cos ? - sin ? sin ?) 
= sin ? cos ? - sin ? cos ?
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Solve each problem.The height in meters of women of a certain tribe is approximated by 
where t is the woman's age in years and 
Estimate the height (to the nearest hundredth) of a woman of the tribe 4 years of age. (Round to the nearest hundredth.)
A. 0.77 m B. 1.12 m C. 0.96 m D. 0.52 m
Find the x-intercepts for the parabola whose equation is given. If the x-intercepts are irrational, round your answers to the nearest tenth.y = 2x2 - 7x - 4
A. x-intercepts (4, 0) and (0.5, 0) B. x-intercepts (-1, 0) and (-2, 0) C. x-intercepts (4, 0) and (-0.5, 0) D. x-intercepts (-1, 0) and (2, 0)
Use the following information to solve the problem. An airport is located at point O. A short-range radar tower is located at point R. The maximum range at which the radar can detect a plane is 4 miles from point R.Assume that R is 5 miles east of O and 7 miles north of O. In other words, R is located at the point 
. An airplane is flying parallel to and 4 miles east of the north axis. (In other words, the plane is flying along the path 
.) What is the greatest distance north of the airport at which the plane can still be detected by the radar tower at R? Round your
answer to the nearest tenth of a mile. A. 9.2 miles B. 10.9 miles C. 10 miles D. 3.1 miles
Find the area of the rectangle.
A. 276 sq ft B. 138 sq ft C. 4761 sq ft D. 9522 sq ft