Question

then
1-1
If x=5+2V6 and cos 6 =
2/7
tan2+ cos2 is
​

Answer 1

Answer:

Explanation:

x=5-2√6

Then 1/x=5+2√6. ( by rationalization)

(5-2√6)²+(5+2√6)²

25+24-20√6+ 25+ 24+20√6

25+24+25+24

50+48

98 is your answer