72.
73a. Look at magic triangle in the answer block at left. Write the
formula when r is the unknown quantity.
73a.
b.
Now, assume that y has become the unknown quantity.
Isolate y.
c.
Given the value of y and r, isolate the unknown. Write the
73b. y = sin x r
formula in the space below.
73c.
74a. Write the function formula for tan .
74a.
b.
Now, place the formula in a magic triangle.
74b.
c.
Look at your magic triangle. Isolate x; write the formula here.
74c.
Isolate the unknown when tan and x are given.
d.
IT0350
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