Monday

December 22, 2014

December 22, 2014

Posted by **sarah** on Sunday, June 12, 2011 at 10:34pm.

- trigonometry -
**Reiny**, Sunday, June 12, 2011 at 10:49pmmake a diagram and use Pythagoras to find the third side x

x^2 + 1^2 = 5^2

x = sqrt(24)

so cos(theta)= sqrt(24)/5

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

= 2(1/5)(sqrt(24)/5)

= 2sqrt(24)/25

or

= 4sqrt(6)/25

**Answer this Question**

**Related Questions**

Trig hep, please? Thank you! - 1. Find the exact value of sin(195(degrees)) 2. ...

trigonometry - 5. If cot 2θ = 5/12 with 0 ≤ 2θ ≤ π...

Clueless in calculus - The function f is defined by f(x)= (25-x^2)^(1/2) for -5 ...

Calc - The function f is defined by f(x)= (25-x^2)^(1/2) for -5 less than or = x...

Discrete Math - So, I uploaded the figure in photobucket, and if you type ...

Algebra - Today I did a practice SAT problem. If the function ƒ is defined by...

Math - If sinθ=1/5 and θ is in Quadrant I, find the exact value of ...

Science - The rms(root-mean-square) value of a periodic signal s(t) is defined ...

Calculus - A cubic polynomial function f is defined by f(x) = 4x^3 + ax^2 + bx...

Calculus - A cubic polynomial function f is defined by f(x) = 4x^3 + ax^2 + bx...