Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.

Get a Professional Answer

Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.

100% Satisfaction Guarantee

Rate the answer you receive.

Ask Ryan Your Own Question

Ryan, Engineer

Category: Pre-Calculus

Satisfied Customers: 8911

Experience: B.S. in Civil Engineering

40260889

Type Your Pre-Calculus Question Here...

Ryan is online now

Find the exact value of cos pi/12 using half angle identity?

Resolved Question:

Find the exact value of cos pi/12 using half angle identity. simplify,including any radicals. Use integers or fractions for any numbers in the expression.Rationalize all denominators.

That depends on if they are asking for a value or an expression.

If they want a value, then it is 0.9659, when rounded to four decimal places.

If they want an expression, then it could be ±√((1 + cos pi/6) / 2). In this case though, it would be helpful to see the answer choices that are available (if it is multiple choice).