Introduction to trigonometry

sin 30 degrees equals:

• 1 0
• 2 1/2
• 3 the square root of 3 over 2
• 4 1

cos 60 degrees equals:

• 1 1
• 2 0
• 3 the square root of 3
• 4 1/2

tan 45 degrees equals:

• 1 0
• 2 2
• 3 1
• 4 undefined

sin squared theta plus cos squared theta equals:

• 1 2
• 2 0
• 3 tan theta
• 4 1

In a right triangle, sin of an angle equals:

• 1 Perpendicular / hypotenuse
• 2 Hypotenuse / base
• 3 Base / hypotenuse
• 4 Perpendicular / base

A ladder 10 m long leans against a wall making 30 degrees with the ground. How high does it reach?

• 1 5 m
• 2 10 m
• 3 20 m
• 4 8.7 m