Question

(vii) cosec 39° cos 51° + tan 21°cot 69° - sec-21° = 0
f the following in terms of trigonome​

Answer 1

Answer:

Step-by-step explanation:

cosec(90-51)cos51+tan21 tan(90-21)-sec21

=sec21 cos21+ tan21 cot21-sec21

=(1/cos21)*cos21+tan21*(1/tan21)-sec21

=1+1-sec21

=2-sec21