cos(A-B)=
cosAcosB+sinAsinB
Cosine of the difference of two angles A and B is given by the formula:
cos(A-B) = cos(A)cos(B) + sin(A)sin(B)
where cos(A) represents the cosine of angle A, sin(A) represents the sine of angle A, cos(B) represents the cosine of angle B, and sin(B) represents the sine of angle B.
In simple terms, the cosine of the difference of two angles is equal to the product of the cosines of each angle added to the product of the sines of each angle with the opposite sign.
It is important to note that this formula only applies to the cosine function and not to other trigonometric functions such as sine, tangent, etc.
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