Multiple Choice%0D%0AFor △ABC, what is the value of cosC?%0D%0A%0D%0A%0D%0A(1 point)
A) cosC = cosA*cosB - sinA*sinB
B) cosC = sinA*cosB - cosA*sinB
C) cosC = 1/(secA*secB)
D) cosC = (a^2 + b^2 - c^2)/(2ab)
B) cosC = sinA*cosB - cosA*sinB
C) cosC = 1/(secA*secB)
D) cosC = (a^2 + b^2 - c^2)/(2ab)