Question

1. If sec=5/4,show that 2 caso-sino/cot0-tan0​

Answer 1

sec= 5/4

cos = 1/sec = 4/5

sin = 1-cos = 1-4/5 = 5-4/5 = 1/5

tan = sin/cos = 1/5 / 4/5 = 1/4

cot = 1/tan = 4

cas-sin/cot-tan = 4/5 - 1/5 / 4-1/4

= 3/5 / 15/4 = 3/5× 4/15

= 1/5 × 4/5 = 4/25

cas-sin/cot-tan = 4/25