See lim's answer to MM's Secondary 4 A Maths Singapore question

lim's answer to MM's Secondary 4 A Maths Singapore question.

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Date Posted: 4 years ago

Comments 4 add a comment

MM

4 years ago

Thanks

MM

4 years ago

Reason for sin c/2 is positive

lim

Lim

4 years ago

C is acute angle，sin（C/2）＞0

MM

4 years ago

Thank you