Sunday

January 25, 2015

January 25, 2015

Posted by **Anonymous** on Tuesday, November 2, 2010 at 10:56pm.

- pre cal -
**Reiny**, Tuesday, November 2, 2010 at 11:49pmlet sin^-1 (3/5) = Ø

then sinØ = 3/5 and cosØ = 4/5

so you want tan 2Ø

= sin2Ø/cos2Ø

= 2sinØcosØ/(2cos^2Ø - 1)

= 2(3/5)(4/5)/(32/25 - 1)

=(24/25) / (7/25)

= (24/25)(25/7)

= 24/7

**Answer this Question**

**Related Questions**

Math- Trig - 1. Determine the exact value of cos^-1 (pi/2). Give number and ...

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

Trig - Can someone check my answers so far? 1. Find the exact value of tan(-3ð) ...

trig - 2sin(x)cos(x)+cos(x)=0 I'm looking for exact value solutions in [0, 3&#...

Math - Use an addition or subtraction formula to write the expression as a ...

Pre-Cal - Find the exact value of sec 60°tan135°-cot60°sin60°

Pre cal - how would you find the exact value of this expression?? 2sin15°cos°

Pre Calc. - Use the sum or difference identity to find the exact value of sin255...

College Pre-Algegra - 1. Find the exact value of tan660 using the functions of ...

trig - please help me with some questions I skipped on a review for our test ...