Question

Find the value of sin10 ​

Answer 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

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Answer 2

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.