Find the exact value of sinpi/12

0.2588

Step-by-step explanation:

To find the exact value for

Sinpi/12

pi=180°

So

Sin 180/12

Sin15°

=0.2588

Step-by-step explanation:

The answer given below is not in the form you need.  You need the form that includes radicals, not decimals.  The formula for the half angle of sin is

so we need to find out what theta is.  If our problem is

, to get that into half angle form, it would be rewritten as

so

Look to your unit circle to find the EXACT VALUE of the cos of that angle.  

Filling that into the formula for the half angle sin:

 Doing a bit of simplifying gives you

and

 and

gives you

which finally simplifies to

That's the answer in exact format.

step-by-step explanation: