[1] 2017/09/13 16:53 Male / 50 years old level / An engineer / Very /

Purpose of use

Just to check whether term sqrt(a^2+b^2-2*a*b*cos(theta)), in formula for "perimeter", may give correct answer (altrough I have already known that it can''t); for example a=b=2^32, theta =1/2^48, just 26 significant figgures, out of 50, due to cosine being too close to 1, better method: c=sqrt((a-b)^2+4*a*b*(sin(theta/2))^2), but nobody uses it, except Professor William Kahan, a few other people and me :-)

Comment/Request

Maybe you may use term that I have proposed, instead of "ordinary used" one...

[2] 2017/09/09 14:06 Female / Under 20 years old / High-school/ University/ Grad student / Very /

Purpose of use

Check answers to see if the java program I wrote works

[3] 2017/08/16 09:54 Female / Under 20 years old / Elementary school/ Junior high-school student / Not at All /

Purpose of use

School

Comment/Request

Can''t use radicalized numbers.

[4] 2014/07/26 22:21 Male / 30 years old level / An engineer / A little /

Purpose of use

time past

Comment/Request

i need

Thank you for your questionnaire. Sending completion

To improve this 'Area of a triangle given sides and angle Calculator', please fill in questionnaire.

The hyperlink to [Area of a triangle given sides and angle]