Question

- tan 5° + sin 15
EXERCISE 8.3
1. Evaluate
tan 20
(iii) cos 48° -sin 42
(iv) cosec 31°- sec 59°
cos 72
cot 64​

Answer 1

Answer:

cos48 - sin 42 = cos (90 - 42) - sin42 = sin42 -sin42 = 0

cosec 31 -sec59 = cosec (90 - 59) - sec59

= sec 59 -sec 59 = 0