Saturday

October 25, 2014

October 25, 2014

Posted by **Anonymous** on Sunday, January 3, 2010 at 1:39pm.

Also, for this problem, why are you supposed to use k(2pi/5) for the solutions, assuming that there is no domain?

2sin^2(5x)+sin(5x)-1=0

Thank you!

- Trigonometry -
**Reiny**, Sunday, January 3, 2010 at 1:56pmYou must be referring to post..

http://www.jiskha.com/display.cgi?id=1262496706

Please give yourself a "nickname" other than "anonymous", it makes it easier to find you for subsequent replies.

for any sin(kx) or cos(kx) the period is 2pi/k or 360º/k

your equation contains sin(5x) and cos(5x), so they both have a period of 2pi/5 radians.

that is why I added k(2pi/5) to each answer.

BTW, for tan(kx) the period is pi/k or 180/kº

- Trigonometry -
**Anonymous**, Sunday, January 3, 2010 at 3:26pmThank you! I will remember to use a nickname in the future. What would the periods be for csc, sec, and cot if I had to solve for those?

**Answer this Question**

**Related Questions**

Precal - How do you find all the polar coordinates of P=(-1, -2pi/3)? I've read ...

Math - Can I please get some help on these questions: 1. How many solutions does...

Math-trigonometry - Several questions from my homework, any are appreciated. ...

math-PLEASE CHECK - Find the surface area and volume of each of the following ...

algebra - i need someone to explain to me how i got this answer...i know the ...

PreCalculus - Hi I need some assistance on this problem find the exact value do ...

Trigonometry - Find the angular speed in radians per sec. of the second hand on ...

Rectangular coordinates to polar coordinates - 1) I'm asked to find 2 sets of ...

calc - i did this problem and it isn't working out, so i think i'm either making...

Math - It takes ten identical pices to form a circular track for a pair of toy ...