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TRIG FLASH CARDS
Terms and Formulas for Trig
20
Mathematics
10th Grade
02/22/2017

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Cards

Term
CSC is the abbreviation for which trig function?
Definition
Cosecant
Term
Sec is the reciprocal of which trig function?
Definition
Cos (cosine)
Term
In a right triangle, the sine of an angle can be determined by this ratio
Definition
opposite/hypotenuse
Term
The correct notation used to solve for A in tan(A) = .2345 is ...
Definition

A = tan-1(.2345)

(tan inverse of .2345)

Term
If sin(B) = 2/3,
then sin inverse(???) = B
Definition
2/3
Term
When you draw a triangle for a shadow problem, where is the shadow on the triangle?
Definition
On the ground, Or the side adjacent to the angle of incline
Term
In a shadow problem, where is the angle of incline?
Definition
It is the angle created by the horizontal side. (the angle touching the ground)
Term
The correct rewritten form used to solve sin(32) = p/4 is
Definition
p = 4*sin(32)
Term
The correct way to solve;
cos(44) = 6/h is
Definition
h = 6/cos(44)
(six divided by cosine of 44)
Term
In a tringle : angle A = 43 degrees, side a = 4 inches, angle B = 72 degress, side b is unknown. Where should you place side b?
Definition

Across from angle B

 

(and side "a" should be across from angle A)

Term
What is the formula for the LAW OF SINES
Definition

[image]

(sine of any angle div by its opposite side is the same as the sine of any other angle divided by its opposite side)

Term
When should you use the LAW of SINES
Definition
When one pair af angle and opposite side is known.
Term
Whan should you use the LAW of COSINES
Definition
When you do not know the value of an angle AND its opposite side.
SSS case, AAA case, SAS case
Term
What is the formula for the LAW of COSINES in a triangle with sides n,m,k when solving for side m ?
Definition

m2 = n2 + k2 - 2(n)(k)Cos(M)

m and M are the incomplete pair

Term
Which right triangle has sides 1, 1, and root 2?
Definition
A 45, 45, 90 dgree triangle
Term
In a 30, 60, 90 degree triangle, the root 3 side goes across from which angle?
Definition
Across from the 60 degree angle
Term
Complete the missing side in this right triangle : 3, 4, ???
Definition
5
Term
Complete the missing side in this right triangle : 5, 12, ??
Definition
13
Term
What is the missing side value in this right traingle: 3, ???, 5
Definition
4
Term
In a right triangle, the hyposenuse is 9 and one of the legs is 4. Would you add or subtract the squares of the sides to find the missing side value x?
Definition

Subtract.

9 squared minus 4 squared equals x squared

81 - 16 = x2

65 = x2

x is the square root of 65

√65

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