A. (1 - sinφ)/ (1 + sinφ)
B. (1 + sinφ)/ (1 - sinφ)
C. (1 - sinφ)/ (1 + cosφ)
D. (1 + cosφ)/ (1 - sinφ)
Please do not use chat terms. Example: avoid using "grt" instead of "great".
