Posted by **Ram** on Friday, October 21, 2011 at 2:29pm.

Find value of tan75/2

- trig -
**Steve**, Friday, October 21, 2011 at 3:36pm
If you mean tan(75/2), then

sin^{2}15 = (1+cos30)/2 = (2-√3)/4

cos^{2}15 = (1-cos30)/2 = (2+√3)/4

sin75 = cos15

cos75 = sin15

tan 75/2 = (1-cos75)/sin75

= (1 - √(2-√3)/4)/√((2+√3)/4)

= (2 - √(2 - √3))/√(2 + √3)

= 0.7673

- LOKMANYA INTER COLLEGE JANKINAGAR MATHS -
**Ramesh kumar Prasad Rajak Raj.Indu**, Thursday, August 27, 2015 at 12:06pm
15root over3

- trig -
**Slok **, Monday, November 23, 2015 at 10:39am
Bindu (1,4)tatha (5,8)ke madh bindu ko mulbindu se milane vali rekh ka samikard geyt karo

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