CBSE Class 10CBSE
Share
Notifications

View all notifications

Find the value of θ in each of the following : (i) 2 sin 2θ = √3, (ii) 2 cos 3θ = 1 - CBSE Class 10 - Mathematics

Login
Create free account


      Forgot password?

Question

Find the value of θ in each of the following :

(i) 2 sin 2θ = √3      (ii) 2 cos 3θ = 1

Solution

(i) 2 sin 2θ= √3

⇒ sin 2θ= √3/2

⇒ sin 2θ= sin 60°

⇒ 2θ= 60° ⇒ θ = 30°

(ii) 2 cos 3θ = 1

⇒ cos 3θ = 1/2

⇒ cos 3θ = cos 60°

⇒ 3θ = 60° ⇒ θ = 20°.

  Is there an error in this question or solution?
Solution Find the value of θ in each of the following : (i) 2 sin 2θ = √3, (ii) 2 cos 3θ = 1 Concept: Trigonometric Ratios of Some Specific Angles.
S
View in app×