7 Answered Questions for the topic Half Angle Formula

05/15/18

#### cot/2= squareroot 3/3

cot   √3 —  = — 2       3
Half Angle Formula Precalculus Sine

11/27/16

#### How do I know what quadrant u/2 is if u is in quadrant 3?

I know how to use the half-angle formulas but I don't know how to find out which quadrant u/2 is in based off of what quadrant u is in.
Half Angle Formula Math Trigonometry Math Help

12/20/15

#### If cosB=1/9, then what is the positive value of cos1/2B, in simplest radical form with a rational denominator?

If cosB=1/9, then what is the positive value of cos1/2B, in simplest radical form with a rational denominator?
Half Angle Formula Trigonometry

11/02/14

#### Use the Half-Angle formulas to find the exact values

a. cos 75°          b. (π/8)         P.S. please show step by step
Half Angle Formula Trigonometry Double Angle Formula

04/20/14

#### Sin 2 u , Cos 2 u , Tan 2 u , Sin u/2 , Cos u/2 , Tan u/2

Given that csc u= 17/15 and 0 < u < pi/2 , use double angle or half angle formulas to find the following
Half Angle Formula Math Trigonometry Math Help

01/03/14

#### Use the half angle formulas to determine.

A. sin22.5 degrees and  B. tanpi/12 degrees

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