Question

please solve this with explaination

Answer 1

here is the solution
in triangle ABC
AD^2=BD^2+AB^2
100=64+AB^2
AB^2=36
AB=6cm
in triangle ABC
AC^2=16+36
AC^2=52
AC=√52
(i)
sinФ=BC/AC
sinФ=4/√52

(ii)cosФ=AB/AC
cosФ=6/√52

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