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Show that Cos38×cos52-sin38×sin52=0

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Show that Cos38×cos52-sin38×sin52=0
  • 3 answers

Vishal Gowtham 5 years, 8 months ago

Hi
Change in 90-theeta and solve now

Deepak Silaych 5 years, 8 months ago

Cos(90-52)*cos(90-38) - sin(38)*sin(52) = sin(38)*sin(52) - sin(38)*sin(52) = 0 Hence proved
http://mycbseguide.com/examin8/

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