Express cos7mcos3m as a sum or difference. Express cos7mcos3m as a sum or difference.

1/2 cos4 m - 1/2 cos10 m
1/2 cos4 m + 1/2 cos10 m
1/2 cos2 m + 1/2 cos5 m
1/2 cos10 m - 1/2 cos4 m

the answer is the third / last answer

step-by-step explanation:

-4, -2, 1, 4

step-by-step explanation:

domain = x values

range = y values

place r′ so that qr′ is parallel to the tangent.

now we get that ∠r′py=∠pr′q, where y is on the tangent, on the opposite side of p from x.

also, because of the symmetry, ∠r′py=∠qpx.

finally, note that no matter where we place r, as long as it's on the correct arc, we have ∠prq=∠pr′q.

stringing all these equalities together, we end up with ∠prq=∠qpx.

this picture will show how its going to look like.

hope this by jack monhen