Question

write the expression as the sine, cosine, or tangent of an angle, cos15(cos43)-sin15(sin34)

Answer 1

i think you might mean sin43 for the last part

Answer 2

or possible cos 34 instead of cos 43

Answer 3

this look like a compounf angle formula

Answer 4

I don't know on the paper that is what it says

Answer 5

cos( A + B) = cosA(cosB) - sinA(sinB)

Answer 6

it must be one of the possibilites I said otherwise you could not write it as one cos, sin or tan.

so if its sin43 for example the answer would be

cos(15 + 43) = cos 58