Math, asked by jonnagantisaiavinash, 10 months ago

what is the value of 2sin10​

Answers

Answered by suraj62111
3

Answer:

VALUE OF 2 SIN 10

Step-by-step explanation:

Given expression is 1−4sin10∘sin70∘2sin10∘1−4sin⁡10∘sin⁡70∘2sin⁡10∘

⇒1−2[cos60∘−cos80∘]2sin10∘⇒1−2[cos⁡60∘−cos⁡80∘]2sin⁡10∘

⇒1−2[12−cos80∘]2sin10∘⇒1−2[12−cos⁡80∘]2sin⁡10∘

⇒2cos80∘2sin10∘⇒2cos⁡80∘2sin⁡10∘

⇒cos(90∘−10∘)sin10∘⇒cos⁡(90∘−10∘)sin⁡10∘

⇒sin10∘sin10∘⇒sin⁡10∘sin⁡10

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Answered by Anonymous
2

\huge\boxed{\fcolorbox{green}{pink}{Answer}}

Given expression is 1−4sin10∘sin70∘2sin10∘1−4sin⁡10∘sin⁡70∘2sin⁡10∘

⇒1−2[cos60∘−cos80∘]2sin10∘⇒1−2[cos⁡60∘−cos⁡80∘]2sin⁡10∘

⇒1−2[12−cos80∘]2sin10∘⇒1−2[12−cos⁡80∘]2sin⁡10∘

⇒2cos80∘2sin10∘⇒2cos⁡80∘2sin⁡10∘

⇒cos(90∘−10∘)sin10∘⇒cos⁡(90∘−10∘)sin⁡10∘

⇒sin10∘sin10∘⇒sin⁡10∘sin⁡10∘

⇒1

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