Find the value of sin10
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Answered by
1
Let, A = 10°
As we know that : Sin3A = 3sinA - 4sin³A
sin30° = 3sin10 - 4sin³10
=> 1/2 = 3sin10 - 4sin³10
=> 6sin10 - 8sin³10 = 1
Let, sin10 = x then
6x-8x³ = 1
=> 8x³-6x = -1
By solving the equation : x = 0.176
So, the value of sin10° will be 0.176
I hope it will be helpful for you
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Answered by
1
Answer:
value of sin 10 =0.173
Step-by-step explanation:
By substitution method:
for sin 10
let A=10, this makes 3A= 30
adding sin on both sides, we have:
sin 3A= sin 30
sin 3A =0.5
now we know,
sin 3A=3sinA-4sin*3 A = 0.5
this is a cubic equation from which u can calculate the value of sin 10 =0.173.
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