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January 29, 2015

January 29, 2015

Posted by **Megan** on Tuesday, January 10, 2012 at 12:00am.

4sin 60degrees - 3tan 135degrees

- Math -
**Reiny**, Tuesday, January 10, 2012 at 1:07amYou should know the trig ratios of the 30-60-90 and the 45-45-90 right-angled triangles

sin 60° = √3/2

so 4sin60° = 4(√3/2) = 2√3

tan 135° = -tan 45° = -1

now put it all together to get

2√3 + 3

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