مثلثیات

What is the value of sin 30 degrees + cos 60 degrees?

• 1 1/2
• 2 1
• 3 sqrt(3)/2
• 4 sqrt(3)

If sin A = 3/5 and A is acute, what is cos A?

• 1 3/4
• 2 5/3
• 3 4/5
• 4 2/5

If sin A = 3/5 and cos A = 4/5, what is sin 2A?

• 1 12/25
• 2 24/25
• 3 7/25
• 4 1

What is the period of the function tan x?

• 1 pi
• 2 2 pi
• 3 pi / 2
• 4 4 pi

What is the value of cos 60 degrees + cos 120 degrees?

• 1 1
• 2 -1
• 3 1/2
• 4 0

How many solutions does sin x = 1/2 have in the interval from 0 to 2 pi?

• 1 1
• 2 2
• 3 3
• 4 4

A triangle has sides 3, 4 and 5. What is the angle opposite the side of length 5?

• 1 60 degrees
• 2 45 degrees
• 3 90 degrees
• 4 120 degrees

What is the area of a triangle with sides 7 and 8 and an included angle of 30 degrees?

• 1 28
• 2 14
• 3 56
• 4 7 sqrt(3)

Which expression equals cos(A + B)?

• 1 cos A cos B + sin A sin B
• 2 sin A cos B + cos A sin B
• 3 cos A cos B - sin A sin B
• 4 sin A sin B - cos A cos B