If sin is equal to 1 by 2 cos b is equal to one upon to find a b and sin 2a
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Sun A=1/2 CosB=1/2. Hence A=30 B=60 Sin2A=root3/2.
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Answer:
A = 30
B = 60
sin 2A = root 3/2
Step-by-step explanation:
Given,
Sin A = 1 / 2 [ Let this be Eqn 1 ]
CosB = 1 / 2 [ Let this be Eqn 1 ]
We know,
sin 30 = 1/2
On comparing this with Eqn 1,We get
A = 30
Similarly,
We know,
cos 60 = 1 / 2
On comparing this with Eqn 2,We get B=60
As per given,
We also need to find sin 2A
sin 2 * 30 = sin 60
Since,
sin 60 = root 3 / 2
Therefore,
sin 2A = root 3/2
Hence,
A = 30
B = 60
sin 2A = root 3/2
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