Question

(iv) 3 cos X = 2 sin2 x​

Answer 1

Step-by-step explanation:

3cosx+3=2sin2x We know that sin2x+cos2x=1 ⇒sin2x=1−cos2x Lets substitute this in our equation 3cosx+3=2(1−cos2x) 3cosx+3=2−2cos2x ...