Sunday

April 20, 2014

April 20, 2014

Posted by **Chelsie** on Monday, June 13, 2011 at 9:29pm.

- Math -
**Reiny**, Monday, June 13, 2011 at 9:52pmI will use a for alpha and b for beta

sin a = 4/√65 , then cos a = -7/√65 in II

tana = sina/cosa = -4/7

cosb = -3/√13 , then sin b = -2/√13 in III

tanb = 2/3

tan(a+b) = (tana + tanb)/(1 - tanatanb)

= (-4/7 + 2/3)/(1 - (-4/7)(2/3))

= 2/29

**Related Questions**

trig - evaluate the following in exact form, where the angeles alpha and beta ...

Trigonometry - a. Find the exact value of sin (theta - pi/6) b. Find the exact ...

Calculus - The question will first read in English followed by a reading in ...

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

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

maths - if alpha and beta are the zeros of the polynomial 2x^2-4x+5 then find ...

Math - If alpha and beta are the zeros of the polynomial ax^2 + bx + c then ...

physics - Two radar stations A and B, are separated by horizontal distance of (...

Math - how i solve this two equations ib order to find alpha and beta 2=cos(...

Trig - Give: a=alpha B=beta csc a= 2 pi/2<a<pi secB=-3 pi/2<B<pi 1)...