1. ## Re: Find the ANGLE

Originally Posted by razemsoft21
Thanks a lot for the steps (logically true)

but this 0.01 changes 1 degree to 20 degrees
and changes angle BAC from 99 degrees to 80 degrees.

again thank you for the logical method.
hmmm i inderstand thnQ i'm noob in maths

2. ## Re: Find the ANGLE

Originally Posted by mido22
hmmm i inderstand thnQ i'm noob in maths
sorry, I don't say that.

a good help from cairo to Palestine (west Bank).

3. ## Re: Find the ANGLE

I get angle BAC = 80° , without rounding anything.

4. ## Re: Find the ANGLE

Hi razemsoft 21,
AD = 10 sin 70/sin 100 =9.54
AC = rad3 - 9.54 = 7.78
quadratic equation gives two solutions 3,47 is shortest which produces an oblique angle at ACD
ACD =110 BAC= 80

The sine law could have been used directly to give a value for ACD 0f 70 but since the question wanted an oblique angle the answer would be its supplement.See ambiguous case sin law

5. ## Re: Find the ANGLE

Originally Posted by bjhopper
Hi razemsoft 21,
AD = 10 sin 70/sin 100 =9.54
AC = rad3 - 9.54 = 7.78