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Date :
tano
+
tano-tan3 o
Coto-Cot30
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1
Answer:
sinθ+cosθ=
3
=(sinθ+cosθ)
2
=3
=sin
2
θ+cos
2
θ+2sinθcosθ=3
⇒2sinθcosθ=2
⇒sinθcosθ=1
⇒sinθcosθ=sin
2
θ+cos
2
θ
⇒1=
sinθcosθ
sin
2
θ+cos
2
θ
⇒tanθ+cotθ=1
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