Tuesday

January 27, 2015

January 27, 2015

Posted by **Tommyt** on Saturday, February 9, 2013 at 4:18am.

- Math -
**Steve**, Saturday, February 9, 2013 at 2:58pmrecall the half-angle formula

tan x/2 = (1-cosx)/sinx

tan(45/2) = (1-1/√2)/(1/√2) = √2 - 1

**Answer this Question**

**Related Questions**

Math-Trigonometry - Show that if A, B, and C are the angles of an acute triangle...

Trig. - sec^2xcotx-cotx=tanx (1/cos)^2 times (1/tan)-(1/tan)=tan (1/cos^2) times...

Trigonometry - Find the exact value of tan(a-b) sin a = 4/5, -3pi/2<a<-pi...

trig - Given that tan 45=1, use tan(x+y) to show that tan 22.5= /2 - 1. (/is ...

math - if sin(x+α)=2cos(x-b) show tan x such that : tan x=(2-tan&#...

Pre-Calc Help!!! - Prove the identity. (show your work please) tan(x − &#...

Math- Precalculus - Write the expression as the sine, cosine, tangent of an ...

trigonometry - Given that tan A = 2 tan B (B is the symbol for Beta) show that ...

Trig - tan 15° using composite argument? - tan 15° tan (45°-30°) (tan 45° - tan ...

calculus - can anyone tell me if tan-1x= 1 over tan x? No. They are different. ...