Saturday

August 23, 2014

August 23, 2014

Posted by **ali** on Sunday, April 17, 2011 at 11:32pm.

- pre cal -
**Bosnian**, Monday, April 18, 2011 at 6:55amsin(theta)=1/5

cos(theta)=sqroot[1-sin(teta)^2]

cos(theta)=sqroot[1-(1/5)^2]

cos(theta)=sqroot(1-1/25)

cos(theta)=sqroot(25/25-1/25)

cos(theta)=sqroot(24/25)

cos(theta)=sqroot(6*4/25)

cos(theta)=sqroot(6*2^2/5^2)

cos(theta)=(2/5)*sqroot(6)

sin(2theta)=2*sin(theta)*cos(theta)

sin(2theta)=2*(1/5)*(2/5)sqroot(6)

sin(2theta)=(4/25)*sqroot(6)

**Related Questions**

trig - If sin theta is equal to 5/13 and theta is an angle in quadrant II find ...

Math - 1. Let (-7, 4) be a point on the terminal side of (theta). Find the exact...

Pre Cal - sin theta - 2sin^2 theta = 0 I'm using the up carrot sign to signal "...

Calculus - I wanted to confirm that I solved these problems correctly (we had to...

math - if sin theta equals 3/5 and theta is second quadrant angle find tan 2 ...

easy trig - If sin(theta)=[sqrt(70)]/7 and theta is in Quadrant two, find the ...

simple trig - If sin(theta)=[sqrt(70)]/7 and theta is in Quadrant two, find the ...

precalc pre ap - If theta is a rotation angle that terminates in quadrant ll and...

trig - If sin 2 theta = (2/5) in Quadrant 2, find sin theta, cos theta, tan ...

Algebra II - Multiple Choice Which expression is NOT equivalent to 1? (theta) ...