Answer:
See Explanation
Step-by-step explanation:
![cos (90-A).sinA + sin(90 - A).cosA = 1 \\ \\ LHS = cos (90-A).sinA + sin(90 - A).cosA \\ \\ = sinA.sinA + cosA.cosA\\ \\ = sin ^{2} A + cos^{2} A \\ \\ = 1 \\ \\=RHS\\\\ reason \\ cos (90- \theta) = sin \theta \\ sin (90- \theta) = cos \theta \\ sin ^{2} \theta + cos^{2} \theta = 1 \\ \\ thus \: proved \\](https://tex.z-dn.net/?f=cos%20%2890-A%29.sinA%20%2B%20sin%2890%20-%20A%29.cosA%20%3D%201%20%20%5C%5C%20%20%5C%5C%20LHS%20%3D%20cos%20%2890-A%29.sinA%20%2B%20sin%2890%20-%20A%29.cosA%20%5C%5C%20%20%5C%5C%20%3D%20sinA.sinA%20%2B%20cosA.cosA%5C%5C%20%20%5C%5C%20%3D%20sin%20%5E%7B2%7D%20A%20%2B%20cos%5E%7B2%7D%20A%20%5C%5C%20%20%5C%5C%20%20%3D%201%20%5C%5C%20%20%5C%5C%3DRHS%5C%5C%5C%5C%20reason%20%5C%5C%20cos%20%2890-%20%5Ctheta%29%20%3D%20sin%20%5Ctheta%20%5C%5C%20sin%20%2890-%20%5Ctheta%29%20%3D%20cos%20%5Ctheta%20%5C%5C%20sin%20%5E%7B2%7D%20%20%5Ctheta%20%2B%20cos%5E%7B2%7D%20%20%5Ctheta%20%3D%201%20%5C%5C%20%20%5C%5C%20thus%20%5C%3A%20proved%20%5C%5C%20)
Your answer is 30.31
Hope this helps!
Answer:sry can't help hope you find somebody that will give you the right answer
Step-by-step explanation:
Answer:
A. C. D.
Step-by-step explanation:
The non-rounded sum is 15.579, so you’d round up to 16 since 5 and up rounds up. Hope this helps<3