if sina = 1/2 then find the value of 3sina - 4sin³a
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what's the question?????
Answered by
1
Answer:
1
Step-by-step explanation:
3sinA-4sin³A=sin3A
Since SinA= 1/2
Hence, A = 30°
Now sin3A = 3sinA - 4sin³A
= sin3(30°)
=sin90°
= 1.
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