Posted by pleasehelp! on Friday, March 4, 2011 at 12:54am.
1. solve tan36 degrees tan2degrees/ 1+tan36 degrees tan 2 degrees as a single function.
2. Find the exact value of sin (αβ) if sina=4/5 and cos β= 9/41 terminal side of α lies in I and terminal side of β lies in III
3. If cosx=1/12 and sinx > 0, find tan2x
thankyou!

PRE CALC  agrin04, Friday, March 4, 2011 at 2:11am
1. tan(36  2) = tan 34
2. sin ? = 4/5 > cos ? = 3/5
cos ? = 9/41 > sin ? = 40/41
sin(??) = sin?*cos?  cos?*sin? = ?
3. tan x = sqrt(143)
tan 2x = 2tanx/(1  tan^2(x)) = ?

PRE CALC  abhay, Friday, March 4, 2016 at 5:56am
how to calculate the value of tan36°
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