Question on: WAEC Mathematics - 1998
In (sin(X+30)^o=cos40^o),find X
A
10o
B
20o
C
50o
D
60o
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Correct Option: B
(sin(X+30)^o=cos40^o<br />
X+30+40=90^o)complementary angles
(X=20^o)
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