Question

If sinθ = 45 , Find the value of sin3θ

• A. 12/25
• B. 44/125
• C. 64/125
• D. 32/45

Answer 1

Answer:

B. 44/125

Solution: Given: sinθ = 4/5 Formula Used: sin3θ = 3sinθ - 4sin3θ Calculation: sin3θ = 3sinθ - 4sin3θ ⇒ sin3θ = 3(4/5) - 4(4/5)3 ⇒ sin3θ = 12/5 - 256/125 ⇒ sin3θ = 44/125 ∴ The answer is 44/125.