Saturday

February 28, 2015

February 28, 2015

Posted by **joan** on Monday, March 25, 2013 at 8:40pm.

30-60-90 triangle theorm

- math -
**Reiny**, Monday, March 25, 2013 at 9:14pmIn an easily accessible part of your notebook

make a sketch of a 30-60-90 triangle, and put in the values

1 opposite the 30°

√3 opposite the 60°

2 opposite the hypotenuse

MEMORIZE THESE VALUES

(the smallest is opposite the smallest angle, etc..)

Do the same for the 45-45-90 using sides

1 - 1 - √2

now tanØ = opposite/adjacent or y/x

tan 30 = 1/√3 , look at your triangle

tan 45 = 1/1 = 1

check with your calculator

**Answer this Question**

**Related Questions**

Math - Determine each tangent ratio to four decimal places using a calculator. ...

Math(Please help) - 1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 ...

Math(Please help) - 1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 ...

Geometry/Trig. - For acute angle Aof a right triangle, find tan A by using the ...

Precalculus - The directions are write the expression as the sine, coine, or ...

Pre-Cal - 1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees = ...

Trigonometry - Please review and tell me if i did something wrong. Find the ...

Math-Trigonometry - Show that if A, B, and C are the angles of an acute triangle...

Physics - I calculated tan and sin (theta) for a physics lab experiment -- two-...

Math - 1. Find the value of Sin^-1(-1/2) a. -30 degrees b. 30 degrees c. 150 ...