abrarabdulraheem9
Asked:
May 2023
If a+b+c=180 then prove that cot^2 A/2+cos^2 B/2+cos^2C/2=2+2sinA/2sinB/2sinC/2
Tan80-tan10/tan70=how much 1) 0 2) 1 3) 2 4) 3
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