Show sin 67 degrees equals to cos 23 degreesThis is year 11 trigonometry. And yea I don't understand this question

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jeew-m | College Teacher | (Level 1) Educator Emeritus

Posted on

sin67 = cos23

This is a true comment.

sin67 = 0.9205

cos23 = 0.9205

 

Usually if `alpha` is any small angle;

`sinalpha = cos(90-alpha)`

`cosalpha = sin(90-alpha)`

 

If `alpha = 67` then;

`90-alpha = 90-67 = 23`

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