In sin X 30 o cos40 o find X - WAEC Mathematics 1998 Question
In \(sin(X+30)^o=cos40^o\),find X
A
10o
B
20o
C
50o
D
60o
correct option: b
\(sin(X+30)^o=cos40^o\
X+30+40=90^o\)complementary angles
\(X=20^o\)
X+30+40=90^o\)complementary angles
\(X=20^o\)
Please share this, thanks:
Add your answer
No responses