Posted by **Anonymous** on Wednesday, January 23, 2013 at 9:53am.

prove that the length of the perpendicular from the origin to the straight line joining the two points having coordinates ( a cos alpha, a sin alpha) and (a cos beta, a sin beta) is

a cos { ( alpha + beta)/2}.

## Answer This Question

## Related Questions

- trig - evaluate the following in exact form, where the angeles alpha and beta ...
- Math - using sin(alpha-beta)=(sin alpha)(cos beta)-(cos alpha)(sin beta) use the...
- trig - express 20sin theta + 4 cos theta as R sin(theta + alpha) R sin(theta + ...
- Math - how i solve this two equations ib order to find alpha and beta 2=cos(...
- math - How would you establish this identity: (1+sec(beta))/(sec(beta))=(sin^2(...
- physics - A golfer takes two putts to sink the ball, one is (81.6 ft, 31.7 ...
- Math - Given that sin alpha=4/sqrt65, pi/2<alpha<pi, and cos beta=-3/...
- maths - if cos(alpha + beta)=0 then what will be the value of sin(alpha - beta)
- Pre Calc. - Use the sum or difference identity to find the exact value of sin255...
- maths - Derive an expression for sin(alpha minus beta) and cos(alpha minus beta...

More Related Questions