Question:
What is (p/q) equal to?
What is (p/q) equal to?
Options:
- a) -tan a.tan 2a
- b) -cot a.cot 2a
- c) tan a.tan 2a
- d) cot a.cot 2a
- a) -tan a.tan 2a
- b) -cot a.cot 2a
- c) tan a.tan 2a
- d) cot a.cot 2a
correct answer : c)
Explanation:
p
q
= tant an
cotc ot
2
2
αα
αα
–
–
=
tant an
tant an
2
11
2
αα
αα
–
–
= (tan tan) tan ·tan
(tan tan)
22
2
αα αα
αα
–
–
= tana . tan2a
p
q
= tant an
cotc ot
2
2
αα
αα
–
–
=
tant an
tant an
2
11
2
αα
αα
–
–
= (tan tan) tan ·tan
(tan tan)
22
2
αα αα
αα
–
–
= tana . tan2a