Question 62

The value of cos2 48° – sin2 12° is 5 +1 5 −1

• (A)
• (B)8 8 5 +1 5 +1
• (C)
• (D)5 2 2 2 2 [Hint: Use cos A – sin B = cos (A + B) cos (A – B)] TRIGONOMETRIC FUNCTIONS 59 1 1