Question

sin 30 - cos 45 how do I do this?

Answer 1

hoping it to be write.

....

Answer 2

Step-by-step explanation:

sin 30 °=cos(90°-30)

=cos 60 °

Now cos 60°-cos 45 °=cos 15°

This answer is according to my standard...

Or follow the other one.... Follow the picture above.