Using the above graph, if 10o < x < 60o, what is the value of x for which sin x = cos x?

Using the above graph, if 10^o < x < 60^o, what is the value of x for which sin x = cos x?

A 0^o
B 20^o
C 30^o
D 45^o
E 50^o

waec 1989 mathematics

The correct answer is D. 45^o

From the graph; when sin x = cos x

x = 45 ⁰

Previous question Next question