# trig

find the exact value by using the appropriate half-angle identity:

sin(5pi/12)

1. 👍 0
2. 👎 0
3. 👁 83
1. Some students can "think" better in degrees than radians, so 5π/12 rd = 75°

sin75 = sin(30+45)
= sin30cos45 + cos30sin45
= (1/2)√2/2 + (√3/2)(√2/2)
= (√2 + √6)/4

1. 👍 0
2. 👎 0
posted by Reiny

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the text contains a single mathematical question asking for the exact value of sin(5pi/12) using a half-angle identity. an answer is not provided in the text.
Given a text passage, determine:
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# trig

find the exact value by using the appropriate half-angle identity:

sin(5pi/12)

1. 👍 0
2. 👎 0
3. 👁 83
1. Some students can "think" better in degrees than radians, so 5π/12 rd = 75°

sin75 = sin(30+45)
= sin30cos45 + cos30sin45
= (1/2)√2/2 + (√3/2)(√2/2)
= (√2 + √6)/4

1. 👍 0
2. 👎 0
posted by Reiny

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1.)Find the exact solution algebriacally, if possible: (PLEASE SHOW ALL STEPS) sin 2x - sin x = 0 2.) GIVEN: sin u = 3/5, 0 < u < ï/2 Find the exact values of: sin 2u, cos 2u and tan 2u using the double-angle formulas. 3.)Use the

asked by MAKITA on April 10, 2009
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asked by jenny on August 24, 2011
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use exact values of the sin,cos and tan of (pi/3) and (pi/6)(which I have found)and the symmetry of the graphs of sin,cos and tan to find the exact values of sin(-pi/6), cos(5pi/3) and tan (4pi/3). I know that sin -(pi/6) = -1/2

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10. ### trigo

Use a half measure identity to find the exact value.. Cos t= 1/3 and 0

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user
TYPE: SINGLE_QUESTION

The text contains a single mathematical question asking for the exact value of sin(5pi/12) using a half-angle identity. An answer is not provided in the text.