Theory of Intelligence
11TH•Mathematics•Trigonometric Identities•Question 3

(iii)

Prove the following:

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(iii)

tan⁡150∘cot⁡330∘−2sec⁡135∘cosec⁡225∘=−3\tan 150^\circ \cot 330^\circ - 2\sec 135^\circ \operatorname{cosec} 225^\circ = -3

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