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Use the Pythagorean Identity to find and ...
I need someone to solve this for me. I don't understand it so i'm hoping once i see how it solved i will be able to do the rest. Thanks a mill.
1) Using the identities for sin(A+B) and cos^2(theta)+sin^2(theta)=1.
Find sine 65 degrees, given that sin 40(degrees)=0.643 and sin 25(degrees)=0.423?
Why on earth did you post this question for the third time?
http://www.mathhelpforum.com/math-he...em-153105.html
http://www.mathhelpforum.com/math-he...em-153216.html
Are people not allowed to bump their own threads or something!?!?