Use the Sum and Difference Identities to find the exact value of the following. You may have need of the Quotient, Reciprocal or Even/Odd Identities as well.

1/ cos(5pi/6)

2/ sin(pi/12)

Question

Use the Sum and Difference Identities to find the exact value of the following. You may have need of the Quotient, Reciprocal or Even/Odd Identities as well.

1/  cos(5pi/6)

2/  sin(pi/12)

anonymous · Answer

Help please!

anonymous · Answer

@Directrix

directrix · Answer

@Rahaf   You need to do a search for those trig formulas unless you know them out of your head. We will need them, and I don't have them filed in my head.

directrix · Answer

@Rahaf Attached is the start-up for the exact value of sine of (pi over 12). You have some multiplying and adding to do. http://tinyurl.com/d3qts39

anonymous · Answer

Alright thanks @Directrix , I need to work more on these types of problems!

directrix · Answer

Did you get the first problem done?