Asked by Khat Si Thu Aung
a+b+c=180,show that sina+sinb+sinc=4cosa/2cosb/2cosc/2
Answers
Answered by
oobleck
google is your friend.
You might want to start here:
https://socratic.org/questions/if-a-b-c-pi-then-prove-that-sina-sinb-sinc-4cos-a-2-cos-b-2-cos-c-2
You might want to start here:
https://socratic.org/questions/if-a-b-c-pi-then-prove-that-sina-sinb-sinc-4cos-a-2-cos-b-2-cos-c-2
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