solve these 3 questions Points possible 0 Total attempts 1 T

Points possible: 0. Total attempts: 1 To verify the identity: tan^2 theta + 1 = sec^2 theta determine the value of tan^2 theta - sec^2 theta for = pi / 4 = Points possible: 0. Total attempts:1 Suppose a = 6 and A = 85 degrees Find: b = c = B = degrees Give all answers to at least one decimal place. Give angles in decrees Points possible: 0. Total attempts: 1 Use a half angle formula to fill in the blanks in the identity below: (cos(3x))^2 =____+_____cos (__________x)

Solution

12)

tan^2 (pi/4) -sec^2(pi/4) = 1-2 = -1

13)

b = a/tanA = 6/tan85 = 0.52

c = a/sinC = 6/sin85 = 6.02

B = 5 degrees

14)

(cos3x)^2 = 1/2 + (1/2) cos6x