Question

**MEDAL** find the exact value of the expression: sin(3pi/4) + sin(5pi/6)

Answer 1

using identity
sinA + sinB = 2 cos[(A-B)/2] sin[(A+B)/2]
you can get the answer

Answer 2

what the **** is identity i ask these questions cause the stupid online tecahers dont give mother bleeping notes that say anything ugh

Answer 3

@Klong0091 Download one of the trig sheets here:
http://tutorial.math.lamar.edu/cheat_table.aspx

They have the assorted identities.