# math

posted by .

find tan 30 degrees and tan 45 degrees using the 45-45-90 triangle therom and
30-60-90 triangle theorm

• math -

In 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

## Similar Questions

1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees = sqrt 3 / 3 Am I correct?

1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees = sqrt 3 / 3 Am I correct?
3. ### Pre-Cal

1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees = sqrt 3 / 3 Am I correct?
4. ### Trigonometry

Please review and tell me if i did something wrong. Find the following functions correct to five decimal places: a. sin 22degrees 43' b. cos 44degrees 56' c. sin 49degrees 17' d. tan 11degrees 37' e. sin 79degrees 23'30' f. cot 19degrees …
5. ### Geometry/Trig.

For acute angle Aof a right triangle, find tan A by using the 45-45-90 Triangle Theorem or the 30-60-90 Triangle Theorem. measure of angle A=45 degrees.
6. ### Precalculus

The directions are write the expression as the sine, coine, or tangent of an angle. (tan 25 degrees + tan 10 degrees) / [1 - [(tan 25 degrees)(tan 10 degrees)]]
7. ### Math

Determine each tangent ratio to four decimal places using a calculator. A) tan 74 degrees B) tan 45 degrees C) tan 60 degrees D) tan 89 degrees How do I figure this out !?
8. ### Physics

I calculated tan and sin (theta) for a physics lab experiment -- two-slit interference I had to use this equation y = L tan (theta), with y = 0.25 and L = 2 and tan (theta) came out to be 7.12 in degrees and 0.1243 in radians. I found …
9. ### Math-Trigonometry

Show that if A, B, and C are the angles of an acute triangle, then tan A + tan B + tan C = tan A tan B tan C. I tried drawing perpendiculars and stuff but it doesn't seem to work?
10. ### Math

In triangle PQR, angle Q= 90 degrees, angle P= 60 degrees and angle R= 30 degrees. PR= 1 unit. Extend side QR to T such that PR= RT. Join PT. Calculate the exact measure of angle T. Determine the exact value of lengths needed to find …

More Similar Questions