Hey there need A quick
relevant answer solve all
correct answer brainlist And 20 thanks
Attachments:
Answers
Answered by
1
assignment 4
until
to
about
for
after
with
instead
as
to
about
on
Answered by
21
Explanation:
Solution :
(1 + cot A)² + (1 – cot)²
opening the brackets using identity
(a + b)² = a² + b² + 2ab.
(a – b)² = a² + b² – 2ab.
☆☞ 1 + cot²A + 2cotA + 1 + cot²A – 2cotA
☆☞ 2cotA – 2cotB = 0
So,
☆☞ 2 + 2cot²A
☆☞ 2(1 + cot²A)
Using identity 1 + cot²A = cosec²A
☆☞ 2cosec²A (LHS)
Hence :
- It is proved.
Some Identities
☆☞ 1 + cot²A = cosec²A
☆☞ 1 + Tan²A = sec²A
☆☞ sin²A + cos²A = 1
Similar questions