Answer:
10.
tan x=51/68
x=tan-¹(51/68)=36.87
11.
cos x=72/78
x=cos-¹(72/78)=22.62
12.
sin x=24/51
x=sin-¹(24/51)=28.07
13.
sin x=21/75
x=sin-¹(21/75)=16.26
14.
sinx =16/85
x=sin-¹(16/85)=10.85
15.
sin x=48/60
x=sin-¹(48/60)=53.13
note
relationship between base and perpendicular is given by tan angle
relationship between base and hypotenuse is given by cos angle
relationship between hypotenuse and perpendicular is given by sin angle
