Let θ = 60°then,3 sin 60° – 4 sin360°= 3sinθ - 4sin3θWe know thatSin3θ = 3sinθ - 4sin3θ⇒ 3 sin 60° – 4 sin360°= sin(3 × 60° )= sin 180°= 0

Q. 44.3( 6 Votes )

Find the value of

Answer :

Let θ = 60°

then,

3 sin 60° – 4 sin³60°

= 3sinθ - 4sin³θ

We know that

Sin3θ = 3sinθ - 4sin³θ

⇒ 3 sin 60° – 4 sin³60°

= sin(3 × 60° )

= sin 180°

= 0

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

Related Videos

Trigonometric Ratios46 mins

Trigonometric Ratios of Specified Angles38 mins

Trigonometric Identities55 mins

Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts

Dedicated counsellor for each student

24X7 Doubt Resolution

Daily Report Card

Detailed Performance Evaluation