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Question :-
If tan a + cot a = 2 , then find the value of tan²a + cot²a .
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Answered by
80
Question :-
If tan a + cot a = 2 , then find the value of tan²a + cot²a .
[ Let a = ∅ ]
▶ Answer :-
→ tan²∅ + cot²∅ = 2 .
▶ Step-by-step explanation :-
➡ Given :-
→ tan ∅ + cot ∅ = 2 .
➡ To find :-
→ tan²∅ + cot²∅ .
METHOD 1 :-
We have ,
▶ Now,
→ To find :-
METHOD 2 :-
We have,
→ tan ∅ + cot ∅ = 2.
[ squaring both side ].
→ ( tan ∅ + cot ∅ )² = 4.
→ tan²∅ + cot²∅ + 2tan∅cot∅ = 4.
→ tan²∅ + cot²∅ + 2 = 4. [ tan∅ cot∅ = 1 ].
→ tan²∅ + cot²∅ = 4 - 2.
tan²∅ + cot²∅ = 2.
✔✔ Hence, it is solved ✅✅.
Answered by
10
Step-by-step explanation:
➡ Given :-
→ tan ∅ + cot ∅ = 2 .
➡ To find :-
→ tan²∅ + cot²∅ .
We have,
→ tan ∅ + cot ∅ = 2.
{ squaring both side }
→ ( tan ∅ + cot ∅ )² = 4.
→ tan²∅ + cot²∅ + 2tan∅cot∅ = 4.
→ tan²∅ + cot²∅ + 2 = 4. [ tan∅ cot∅ = 1 ].
→ tan²∅ + cot²∅ + 2 = 4. [ tan∅ cot∅ = 1 ].→ tan²∅ + cot²∅ = 4 - 2.
∴ tan²∅ + cot²∅ = 2.
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