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Calculate the following without using t...

Calculate the following without using trigonometric tables
(i) `tan 9^(@) - tan 27^(@) - tan 63^(@) + tan 81^(@)`
(ii) `cosec 10^(@) -sqrt(3) sec 10^(@)`
(iii) `2sqrt(2) sin 10^(@) [(sec 5^(@))/(2) + (cos 40^(@))/(sin 5^(@))-2 sin 35^(@)]`
(iv) `cot 70^(@)+4 cos 70^(@)`

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The correct Answer is:
C, D
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2sqrt(2)sin10^(@)((sec5^(@))/(2)+(cos40^(@))/(sin5^(@))-2sin35^(@))=?

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MOTION-TRIGNOMETRIC RATIOS & IDENTITIES -Exercise -3
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