Guys please solve this
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PLZ MARK THIS AS BRAINLIEST.....
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saiagarwal707:
Hey (a+b-c)^2 formula is a2+b2+c2+2ab-2bc-2ca but instead of -2bc you used -b2
it can be used like that also
Okay,but how did you get 1-cos/1+cos at the end could you explain that.
Your answer lack information it is wrong
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