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CBSE Class 10 Answered

  In ∆ABC,m∠B=90°,AB=7cm and AC-BC=1cm.Determine the values of sinB and cosB.
Asked by sibaramamohanty | 02 Mar, 2018, 08:12: AM
answered-by-expert Expert Answer
use Pythagoras to find sides
also, AC-BC=1 given
AC2=AB2+BC2
AC2-BC2=49
(AC+BC)(AC-BC)=49
AC+BC=49
Answered by Arun | 02 Mar, 2018, 04:33: PM

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