Question

7. If tano = 3/4 then find the value of 1+cos20/1-cos20​

Answer 1

Answer:

tano = 3 / 4 = p / b

by using pythagora theorem ,

h² = p² + b²

= 9 + 16

= 25

h = 5

: 1 + cos20 / 1 - cos20 =( 1 + 4/5×20) / (1- 4/5×20)

= 17 / 16