Prove that cot 0 - tan 0 = 4COS
sin o cos
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Step-by-step explanation:
cot θ - tan θ
= cos θ / sin θ - sin θ / cos θ
= { cos ² θ - sin ² θ } / sin θ cos θ
= { ( 1 - sin ² θ ) - sin ² θ } / sin θ cos θ
= { 1 - 2sin²θ } / sin θ cos θ
= cosec θ. sec θ - 2 tan θ
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