1) Find the value ofvi) sin 120°
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3
sin 120°=sin(180°- 60°)
⇒sin(60°)
⇒√3/2.
∴sin 120°= √3/2..
⇒sin(60°)
⇒√3/2.
∴sin 120°= √3/2..
Answered by
1
Use sinA=sin(180-A)
sin(60°)=Sin(180-60)°
sin(60°)=sin(120°)
And we know that sin60°=√3/2
Hence, sin60° = sin120°
Therefore, sin120° = √3/2
sin(60°)=Sin(180-60)°
sin(60°)=sin(120°)
And we know that sin60°=√3/2
Hence, sin60° = sin120°
Therefore, sin120° = √3/2
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