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Calculate without using trigonometric ta...

Calculate without using trigonometric tables:

A

`4 cos 20^(@)-sqrt(3)cot20^(@)`

B

`(2cos40^(@)-cos20^(@))/(sin20^(@))`

C

`cos^(6)(pi)/(16)+cos^(6)(3pi)/(16)+cos^(6)(5pi)/(16)+cos^(6)(7pi)/(16)`

D

`tan10^(@)-tan50^(@)+tan70^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
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