Sunday

September 14, 2014

September 14, 2014

Posted by **Emily** on Monday, May 24, 2010 at 11:09pm.

If tan x = 3/5, evaluate:

1) tan 2x

2) tan 3x

==> For #1, I got 15/8; for #2, I got -99/5. Are these answers correct?

- Math Analysis -
**Reiny**, Monday, May 24, 2010 at 11:13pmboth correct, good job

- Math Analysis -
**Emily**, Monday, May 24, 2010 at 11:19pmThank you :)

**Answer this Question**

**Related Questions**

Integration - Intergrate ¡ì sec^3(x) dx could anybody please check this answer. ...

calculus - I need help on finding the local linear approximation of tan 62 ...

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

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

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

trig - h t t p : / / i m g 4 0 . i m a g e s h a c k . u s / c o n t e n t . p h...

calculus (check my work please) - Not sure if it is right, I have check with the...

Trigonometry - Hello, everyone: I am working on finding the exact values of ...

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

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