anonymous
  • anonymous
Trigonometry
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
The value of the trigonometrical expression \[(4\sin2\ 60^o + 3\tan2\ 30^o – 8 \sin45^ocos 45^o) \ is\] @kropot72
anonymous
  • anonymous
help?/
kropot72
  • kropot72
Just substitute these values: \[\sin ^{2}60=(\frac{\sqrt{3}}{2})^{2}\] \[\tan ^{2}30=(\frac{1}{\sqrt{3}})^{2}\] \[\sin 45=\cos 45=\frac{ \sqrt{2}}{2}\]

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anonymous
  • anonymous
I didn't get that
anonymous
  • anonymous
@kropot72
kropot72
  • kropot72
What part didn't you get? You just need to plug in the values that I gave and simplify.
anonymous
  • anonymous
the starting
kropot72
  • kropot72
\[(4\times \frac{3}{4})+\frac{3}{3}-8(\frac{\sqrt{2}}{2}\times \frac{\sqrt{2}}{2})=?\]
anonymous
  • anonymous
1/2
kropot72
  • kropot72
3 + 1 - 4 = ? Do you want to know how the exact values for the trig ratios are derived?
anonymous
  • anonymous
yo if u could do that
anonymous
  • anonymous
@Rohangrr , kropot72 basically gave you the answer, his work is spot on. If you follow each of this work from each post, you'll get to the right answer, which, as he/she said in their last response, is 0
kropot72
  • kropot72
|dw:1365502988183:dw| |dw:1365502674259:dw|

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