Half-angle formula

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Questions (8)

Use the half-angle formula to simplify the given expression.squareroot 1+cos12x/2
1. 4 answers
2. asked by jessica maths
3. 997 views
I had this on a test:Use the half-angle formula to find the exact value of the expresseion: sin 22.5 degrees my answer - 1/2
1. 4 answers
2. asked by kelly
3. 681 views
How do i find the exact value of sin 15 using the half angle formula
1. 3 answers
2. asked by Briana
3. 864 views
how to do the calculation while taking 'A'as 15 in the half angle formula used for calculating the value of sin 7.5 ?
1. 2 answers
2. asked by Anonymous
3. 935 views
use the half angle formula to determine the exact values of sin, cos, and tan of the angle.pie/8 and pie/12
1. 4 answers
2. asked by trista
3. 576 views
Find the exact value of sin(u/2), cos(u/2), and tan(u/2) using the half-angle formula, given that cscu = -5/3 and π < u < 3π/2
1. 3 answers
2. asked by Amanda
3. 926 views
Find the exact value of sinx/2 if cosx = 2/3 and 270 < x < 360.A)1/3 B)-1/3 C)sqrt 6/6 D)-sqrt 6/6 C, since I KNOW cosx is
1. 5 answers
2. asked by Jon
3. 879 views
use a half angle formula to find the exact value of the expression.tan112.5 degrees
1. 1 answer
2. asked anonymously
3. 7 views