Sine and Cosine Relationships

The branch of mathematics that studies the relationships involving sides and angles of triangles.

• Trigonometry

• Geometry

• Calculus

• Statistics

What type of triangles do you use the trig ratios with?

• any type

• right triangle

• obtuse triangle

• acute triangle

Find the value of x, rounded to the nearest tenth.

At what angles do the sine and cosine functions have equal values in the first quadrant?

• 30^o

• 45^o

• 60^o

• 90^o

What is the cos 17 in terms of sine?

• sin 63

• sin 73

• sin 17

• cos 73

At what angle are sine and cosine the same value?

For what angles are sine and cosine the same?

• 0^o

• 45^o and 135⁰

• 45^o and 225⁰

• 45^o and 315⁰

Which of the following choices is equal to sin 53^ο?

• cos 37^ο

• cos 53^ο

• sin 37^ο

Find the value of x, rounded to the nearest tenth.

Choose the correct ratio.

• sinZ=5/13

• sinX=5/13

• cosX=13/12

• tanZ=12/5