Find the angles to the nearest 1/2 degree, using the functions given.

a. Sin θ = .2713

b. Cos θ = .7630

c. Tan θ = .2773

= _____

= _____

= _____

57a. Answers:

= 15.5

= 40.5

=15.5

a.

b.

c.

If you had trouble getting these values, check your arithmetic.

Seek help from the

instructor if necessary.

57b. And the function for the angles given.

= 45

= 45.5

= 16.5

a.

b.

c.

Sin θ = _____

Cos θ = _____

Tan θ = _____

57b. Answers.

a. Sin θ = .7071

b. Cos θ = .7009

c. Tan θ = .2962

58.

Trying to memorize formulas such as the trig functions can be difficult. However, you are

required to know them. As a memory "crutch," here is a saying that you may use to help

you remember them: "Oscar Had A Heap Of Apples." Take the underlined capital

letters, and group them vertically as in

the block to the right.

Each ratio is

equal to a trig function. The functions

are listed in the order in which you

learned them. Complete the formulas in

the block above by writing the correct

function in each blank.

Integrated Publishing, Inc. |