Solving Triangles Using Trig

Find, to the nearest degree, the angle which the sun's rays make with the ground when a flagpole 40 feet high casts a shadow 30 feet long.

• 48^o

• 37^o

• 28^o

• 53^o

Which trig function should we use to solve for the length of the side length opposite of 15 degrees?

• sine (SOH)

• cosine (CAH)

• tangent (TOA)

Which trig function should we use to solve for the angle marked with the theta?

• sine (SOH)

• cosine (CAH)

• tangent (TOA)

Which trig function should we use to solve for the angle marked with the theta? (on #6 from your worksheet)

• sine (SOH)

• cosine (CAH)

• tangent (TOA)

Which trig function should we use to solve for x on #7 from your worksheet?

• sine (SOH)

• cosine (CAH)

• tangent (TOA)

How can we solve for the last side?

• Pythagorean Theorem

• Cosine (CAH)

• Either one works!

Set up a correct trig ratio to solve for x. Select the correct equation.

Answer explanation

Set up a correct trig ratio to solve for x. Select the correct equation.

Answer explanation

Set up a trig ratio to calculate the height of the tree. Select the correct equation to solve for x.

Answer explanation

Set up a correct trig ratio to solve for x. Select the correct equation.

Answer explanation