Express the function tan 120deg as a function of an acute angle?

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Express the function tan 120deg as a function of an acute angle?

a. -tan 60deg
b. -cot 60deg
c. cot 60deg
d. tan 60deg

2007-04-15 04:43:12 · 2 answers · asked by elson7997 1 in Science & Mathematics ➔ Mathematics

2 answers

2007-04-15 04:47:17 · answer #1 · answered by helpmepls 1 · 0⤊ 0⤋

Use your reference angle and quadrant mnemonic ASTC.
The reference angle for 120 degrees is 60 degrees
and we are in quadrant II, so the tangent is negative.
The answer is a. -tan 60 degrees.

2007-04-15 11:49:27 · answer #2 · answered by steiner1745 7 · 0⤊ 0⤋