Sec²A.cos²A-(tan²A+cot²A)=
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Answer:
Step-by-step explanation:
Sec²a.cos²a-(tan²a+cot²a)
= cos²a/cos²a -(sin²a/cos²a + cos²a/sin²a)
= 1-(sin^4a +cos^4a)/sin²a cos²a
using formula
a²+b² = (a+b)²-2ab
= 1-[(sin²a+cos²a)²-2sin²acos²a]/sin²acos²a
=1-(1/sin²acos²a. )+2
= 3- 1/sin²acos²a
NeelamG:
mark as brainlist
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