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MHT CET202014 Oct 2020Evening ShiftMathematicsTrigonometric Ratios & IdentitiesActual

Which of the following have the same value (a) 120^ (b) 930^ (c) 840^ (d) (-1110^ )

Options

  1. Aonly (a) and (b)
  2. BAll (a),(b),(c),(d)
  3. Conly (a) and (c)
  4. Donly ( c ) and ( d )

Correct answer

D. only ( c ) and ( d )

Step-by-step solution

(a) 120^ = (90^ +30^ )= 30^ = 3 2 (b) 930^ = [ (2 360^ )+210^ ]= 210^ = (180+30)=- 30^ =- 3 2 (c) 840^ = [ (2 360^ )+120^ ]=- 120^ =- 30^ =- 3 (d) (-1110^ )=- 1110^ =- [ (3 360^ )+30^ ]=- 30^ =- 3

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