Verify the identity.(a tan ? + b)2 + (b tan ? - a)2 = (a2 + b2) sec2 ?
What will be an ideal response?
(a tan ? + b)2 + (b tan ? - a)2 = a2 tan2 ? + 2ab tan ? + b2 + b2 tan2 ? - 2ab tan ? + a2 
= (a2 + b2) sec2 ?
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Use the properties of parallel lines to solve the problem.If p 
q and m?8 = 48°, what are the measures of the other angles?
A. m?5 = m?6 = m?7 = 48° , m?1 = m?2 = m?3 = m?4 = 132° B. m?2 = m?4 = m?6 = 48°, m?1 = m?3 = m?5 = m?7 = 132° C. m?2 = m?4 = m?6 = 48° , m?1 = m?3 = m?5 = m?7 = 142° D. m?2 = m?4 = m?6 = 48° , m?1 = m?3 = m?5 = m?7 = 42°
Use the figure below to answer the following question(s).
Which graphs are disconnected?
A. Graph 3 only B. Graph 1 and Graph 4 C. Graph 2 and Graph 3 D. Graph 2 only E. none of these
Express the number in scientific notation.0.0000004
A. 4 × 10-6 B. 4 × 10-8 C. 4 × 10-7 D. 4 × 10-9
Solve the formula for the specified letter.P = 
for r
A. r = P - tA
B. r = 
C. r = 
D. r = 