Trigonometrical Functions and Identities-Converted

Trigonometrical Functions and Identities(A
Choose the most appropriate option (a, b, c or d).


Q 1. If tan  = then sec  - tan  is equal to



(a) (b)



Q 2. sec2  = , where x  R, y  R, is true if an


(a) x + y  0 (b) x = y, x  0


Q 3. sin2  , where x  R, gives real  if and


(a) x + y = 0 (b) x = y (c)


Q 4. cosec  , where x  R, y  R, gives real


(a) x = y  0 (b) |x| = |y|  0

, Q 9. The value of + 4 is equal to


(a) (b)


Q 10. The value of sin 78  - sin 66  - sin 42  + sin 6 


(a) (b) 


Q 11. The value of cosec 20  - sec 20  is equal to


(a) 2 (b) 4



Q 12. The maximum value of


(a) 3 (b) 5

Q 13. The minimum value of cos 2  + cos  of real values


(a) (b) 0