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

a. Sin = .2713

b. Cos = .7630

c. Tan = .2773

= _____

= _____

= _____

57a. Answers:

a.

= 15.5

b.

= 40.5

c.

=15.5

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.

a.

= 45

b.

= 45.5

c.

= 16.5

Sin = _____

Cos = _____

Tan = _____

57b. Answers.

a. Sin = .7071

b. Cos = .7009

c. Tan = .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.