Evaluate:2cot330tan570−tan200cot700−2cos450

2cot330tan570−tan200cot700−2cos450=2cot330tan(900−330)−tan200cot(900−200)−2(21)=2cot330cot330−tan200tan200−1=2−1−1=0.

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Evaluate: 2{57^{0}}{33^{0}}-{70^{0}}{20^{0}}-{2}45^{0}

Question

Evaluate:
$2 \frac{tan 5 7 ^{0}}{cot 3 3 ^{0}} - \frac{cot 7 0 ^{0}}{tan 2 0 ^{0}} - 2 cos 4 5^{0}$

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Evaluate:

2 \frac{tan 5 7 ^{0}}{cot 3 3 ^{0}} - \frac{cot 7 0 ^{0}}{tan 2 0 ^{0}} - 2 cos 4 5^{0}

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9 mins ago

2 \frac{tan 5 7 ^{0}}{cot 3 3 ^{0}} - \frac{cot 7 0 ^{0}}{tan 2 0 ^{0}} - 2 cos 4 5^{0}

= 2 \frac{tan ( 9 0 ^{0} - 3 3 ^{0} )}{cot 3 3 ^{0}} - \frac{cot ( 9 0 ^{0} - 2 0 ^{0} )}{tan 2 0 ^{0}} - 2 (\frac{1}{2})

= 2 \frac{cot 3 3 ^{0}}{cot 3 3 ^{0}} - \frac{tan 2 0 ^{0}}{tan 2 0 ^{0}} - 1

= 2 - 1 - 1

= 0

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Question Text	Evaluate: $2 \frac{tan 5 7 ^{0}}{cot 3 3 ^{0}} - \frac{cot 7 0 ^{0}}{tan 2 0 ^{0}} - 2 cos 4 5^{0}$
Answer Type	Text solution:1
Upvotes	150