Choose the letter of your choice that best answers the questions. Write your answer on the space provided before each number. 1. If some of the values of the domain is not included in the solution set of an equation, then the equation is A. trigonometric B. contradictory C. conditional D. identity 2. Which among the equation is not an identity equation? A. cos? x 1- sin? x B. cos? x = 1 + sin? x C. tan2 x + 1 = sec2 x D. cot? x = csc2 x-1 3. Which is an identity equation? C. sec2 x- tan2 x = 1 D. sin? x + cos? x = 1 A. sin? x- cos? x = 1 B. csc? x - cot2 x = 1 1+tan2 0 is simplified, then it is equal to C. csc? 0 4. If the expression 1+cot2 8 B. tan? 0 D. cos2 0 A. sin? 0 5. Which is a conditional equation? A. sin? x = 1- cos? x C. (sin x – cos x)2 = sin? x - cos² x cscx cotx В. secxtanx cot3 x D. tan x cotx = 1 %3D 6. Which is not a solution to the equation sin x cos x 0? A. x == B. x = C. x = 0 D. x = 2T TE 7. When the entire domain becomes the solution set of an equation, then the equation is A. trigonometric B. contradictory C. conditional D. identity 8. Which among the equation is an identity equation? B. x2 == A. 2x - 6 = 2(x - 3) C. 2x -1 = 2(x + 3) D. 5x 20 9. Which is not a Pythagorean identity? A. sin2 x + cos2 x = 1 B. csc2 x - cot2 x = 1 C. sec2 x- tan² x = 1 D. sin? x - cos² x = 1 is simplified, then it is equal to 1+cot 0 1+tan 0 10. If the equation A. sin 0 B. cos 0 C. tan 0 D. sec 0

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