Question

if 3tanA = 4. Then find sinA​

Answer 1

Answer:

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Step-by-step explanation:

Answer 2

Given

• 3tanA = 4

To find

• sinA

Solution

⇒ 3tanA = 4

⇒ tanA = 4/3

(tanθ = perpendicular/base)

• P = 4
• B = 3

Applying Pythagoras theorem

H² = B² + P²

⇒ H² = (3)² + (4)²

⇒ H² = 9 + 16

⇒ H² = 25

⇒ H = √25

⇒ H =™5

Now, finding the value of sinA

(sinθ = perpendicular/height)

⇒ sinA = P/H

• P = 4
• H = 5

⇒ sinA = 4/5

★ Hence, the value of sinA is 4/5