In (sin(X+30)^o=cos40^o),find X
-
A.
10o -
B.
20o -
C.
50o -
D.
60o -
E.
90o
Correct Answer: Option B
Explanation
(sin(X+30)^o=cos40^o\
X+30+40=90^o)complementary angles
(X=20^o)
(sin(X+30)^o=cos40^o\
X+30+40=90^o)complementary angles
(X=20^o)