Evaluate:sin23o2cos67o−cot50otan40o−cos60o

sin23o2cos67o−cot50otan40o−cos60osin23o2cos(90o−23o)−cot50otan(90o−50o)−cos60o−21=sin23o2sin23o−cot50ocot50o−21=2−1−21 [∵cos60o=21]=2−3/2=21

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Evaluate: {2 67^o}{ 23^o}- { 40^o}{ 50^o}- 60^o

Question

Evaluate:
$\frac{2 cos 6 7 ^{o}}{sin 2 3 ^{o}} - \frac{tan 4 0 ^{o}}{cot 5 0 ^{o}} - cos 6 0^{o}$

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Evaluate:

\frac{2 cos 6 7 ^{o}}{sin 2 3 ^{o}} - \frac{tan 4 0 ^{o}}{cot 5 0 ^{o}} - cos 6 0^{o}

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12 mins ago

\frac{2 cos 6 7 ^{o}}{sin 2 3 ^{o}} - \frac{tan 4 0 ^{o}}{cot 5 0 ^{o}} - cos 6 0^{o}

\frac{2 cos ( 9 0 ^{o} - 2 3 ^{o} )}{sin 2 3 ^{o}} - \frac{tan ( 9 0 ^{o} - 5 0 ^{o} )}{cot 5 0 ^{o}} - cos 6 0^{o} - \frac{1}{2}

= \frac{2 sin 2 3 ^{o}}{sin 2 3 ^{o}} - \frac{cot 5 0 ^{o}}{cot 5 0 ^{o}} - \frac{1}{2}

= 2 - 1 - \frac{1}{2}

[∵ cos 6 0^{o} = \frac{1}{2}]

= 2 - 3/2

= \frac{1}{2}

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Question Text	Evaluate: $\frac{2 cos 6 7 ^{o}}{sin 2 3 ^{o}} - \frac{tan 4 0 ^{o}}{cot 5 0 ^{o}} - cos 6 0^{o}$
Answer Type	Text solution:1
Upvotes	150