Introduction to Trigonometry- Grade 10

In the adjoining figure, ABC is a right triangle right angled at B; AB=24cm, BC=7cm. Using the figure , answer the question:

The value of sin A is

• 7/(24)

• 7/(25)

• (25)/7

• (24)/(25)

Observe the figure and answer the question:

The value of sec A is

• (24)/7

• 7/(24)

• (25)/(24)

• (25)/7

Observe the figure and answer the question:

The value of 2cosA-sinC is

• (25)/24

• (24)/(25)

• (41)/(25)

• (49)/(25)

If sinA =1, then cos A is.........

• 0

• 1

If  $\theta$ = 45 deg, then the value of $2\sin\theta\cos\theta\$ is.......... 

• 0

• 1

State true/false

cot A is the product of cot and A

• True

• False

State true/false

cosA is the abbreviation used for the cosecant of angle A

• True

• False

State true/false
secA is not defined for A= 90 deg

• True 

• False

State true/false

The value of sin(theta) increases as theta increases from 0 deg to 90 deg

• True

• False

The trigonometric ratios of an acute angle in a right angled triangle express the relationships between the angle and the lengths of the sides of the triangle.

• True

• False