Question

angel A
AC 12
CB 5
AB
(2) a
From the figure (1) given below, find the values of:
(i) sin B (ii) cos C
(iii) sin B + sin C (iv) sin B cos C + sin C cos B.
mathematics - IX ​

Answer 1

Answer:

i) sin B=12/13

ii)cos C=12/13

iii)sin B+ sin C=12/13+5/13

=17/13

iv)sin B cos C+sin C cos B=12/13x12/13+5/13x5/13

=144/169+25/169

=169/169=1