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Q) If θ is an acute angle and sin θ = cos θ, find the value of tan2 θ + cot2 θ – 2.
Ans:
tan2 θ + cot2 θ – 2.
= 
+ 
– 2
By sin θ = cos θ (given),
= 
+ – 2
= 1 + 1 – 2
= 0
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