# Answer to Question #10782 in Trigonometry for kashif

Question #10782

If sin A = cos A

find A

find A

Expert's answer

First of all, let's substitute

cos x = sin (x + pi/2).

This gives

sin x = sin (x + pi/2),

wheach leads to x = pi/4 ± pi·k, where k is some integer.

cos x = sin (x + pi/2).

This gives

sin x = sin (x + pi/2),

wheach leads to x = pi/4 ± pi·k, where k is some integer.

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