# Q4 - 3RD SUMMATIVE TEST

## Quiz by Maria Resureccion M. Borja

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- Q1
Which of the following summarizes the law of sines?

$bcSinA\backslash \; =\backslash \; acSinB\backslash \; =\backslash \; abSinC$

$a\backslash \; Sin\backslash \; A\backslash \; =\backslash \; b\backslash \; Sin\backslash \; B\backslash \; =\backslash \; c\backslash \; Sin\backslash \; C$

$\backslash sin\backslash \; A\backslash \; =\backslash \; Sin\backslash \; \backslash \; B\backslash \; =\backslash \; Sin\backslash \; C$

$\backslash frac\{a\}\{Sin\backslash \; A\}=\backslash frac\{b\}\{Sin\backslash \; B\}=\backslash frac\{c\}\{Sin\backslash \; C\}$

60s - Q2
The acute angle that has the same sine value as 130° is:

$20\backslash degree$

$30\backslash degree$

$50\backslash degree$

$40\backslash degree$

60s - Q3
To be able to use the sine rule in a triangle, we must always know:

two angles

one angle and one side

one angle and the length of its opposite side

two sides

60s - Q4
What are the two angles that have the same sine value?

50⁰ and 150⁰

40⁰ and 130⁰

40⁰ and 140⁰

20⁰ and 120⁰

120s - Q5
With respect to the given angle, what is the ratio of the opposite side to the hypotenuse?

Sine

cosecant

tangent

cosine

60s - Q6
Evaluate Sine 90⁰

0

1

.5

2

60s - Q7
In the triangle DEF, what is the measure of angle E to the nearest degree

$17\backslash degree$

$20\backslash degree$

$18\backslash degree$

$19\backslash degree$

300s - Q8
Using the law of cosine, which formula is to be used?

a²=a²+c² -2bc (cos A)

a=b²+c² -2bc² (cos C)

a=b²+c² -2bc(cos A)

a²=b²+c²-2bc (cos A)

60s - Q9
In aright triangle, with respect to the given angle, what is the ratio of the adjacent side to the hypotenuse?

secant

tangent

cosine

sine

60s - Q10
What are the two kinds of oblique triangle?

obtuse only

right and acute

acute and obtuse

acute only

60s