If A is an obtuse angle and cos A = 3/5, find the values of tan A

What is the area of the trapezoid shown ?

What is the approximate value of  q  in the equation below? –1.613–1.5220.5853.079

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given