WAEC - Mathematics (1989 - No. 14)
Using the above graph, if 10º < x < 60º, what is the value of x for which sin x = cos x?
0o
20o
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45o
50o
설명
From the graph; when sin x = cos x
x = 45º
x = 45º
Using the above graph, if 10º < x < 60º, what is the value of x for which sin x = cos x?