Solving trigonemtric equations

Solving trigonemtric equations

What is trigonometry?

• branch of mathematics that studies relationships between side lengths and angles of triangles

The leg is also called adjacent

Most common functions:

• sine function is written as sin(x)

• cosine function is written as cos(x)

• tangent function is written as tan(x)

In other words:

The tangent of angle A = the length of the opposite side divided by the length of the adjacent side

The sine of angle A = the length of the opposite side divided by the length of the hypotenuse

The cosine of angle A = the length of the adjacent side divided by the length of the hypotenuse

For your notes:

• sin=opp/hyp

• cos=adj/hyp

• tan=opp/adj

Multiple Choice

What ratio can you find for an angle when you have the adjacent side to the angle and the hypotenuse

• cosine

• sine

• tangent

• trigonometry

Multiple Choice

What ratio can you find for an angle when you have the opposite side of the angle and the hypotenuse

• cosine

• sine

• tangent

• trigonometry

Multiple Choice

If you are given the two sides that are not the hypotenuse, which trig function should you use?

• sine
• cosine
• tangent
• cotangent

Multiple Choice

What is the ratio for Sine?

• Adjacent Leg / Opposite Leg 
• Opposite Leg / Hypotenuse
• Hypotenuse / Opposite Leg 
• Adjacent Leg / Hypotenuse

Multiple Choice

Find the trig value.

• A
• B
• C
• D

Multiple Choice

Find the trig value.

• A
• B
• C
• D

Multiple Choice

Find the trig value.

• A
• B
• C
• D

Multiple Choice

Find the trig value.

• A
• B
• C
• D

Multiple Choice

Find the trig value.

• A
• B
• C
• D

Multiple Choice

Find the trig value.

• A
• B
• C
• D

Questions?