= -16/cos^2(26) + cos^2(116)= -16/(cos^2(26)) + (cos^2(116))= -16/(0.9781) + 0.9796= -16.36 + 0.9796= -15.3804
= -16/cos^2(26) + cos^2(116)
= -16/(cos^2(26)) + (cos^2(116))
= -16/(0.9781) + 0.9796
= -16.36 + 0.9796
= -15.3804