Precalculus
posted by Jess .
Find the exact value of sin 15°.
I got square root of 2squaroot of 3/2
is that correct?

You'd have to get used to being precise with parentheses if you want to do well in maths.
I got "square root of 2squaroot of 3/2"
means
√2  √(3/2),
more or less, which is probably not quite what you mean.
sin(15°)
can be found by the halfangle formula
sin(θ/2)
=sqrt((1cos(θ))/2)
=sqrt((1cos(30°))/2)
=sqrt((1(√3)/2)/2)
=sqrt((2√3)/4)
=sqrt(2√3)/2
which is very similar to your answer less the parentheses.
Respond to this Question
Similar Questions

Trig functions and such
1)Find the exact value of cot(315) A)1 B)square root of 2 C)square root of 2 over 2 D)2 I chose C 2)Find the exact value of sin(pi/6) A)1/2 B)square root of 3/2 C)square root of 2/2 D)square root of 2/2 I chose A 3)In triangle … 
math
1)In triangle ABC, C=60 degrees, a=12, and b=5. Find c. A)109.0 B)10.4 C)11.8 D)15.1 I chose B 2)Which triangle should be solved by beginning with the Law of Cosines? 
Algebra
Use the quadratic formula to solve the equation. Give exact answers: 2x^2 1 = 6x. The choices are: a) 3 + square root(7)/2, 3  square root(7)/2 b) 3 + square root(11)/2, 3  square root(11)/2 c) 3 + square root(7)/2, 3  square … 
precalculus
find the exact value: cos^1 (square root of 2 divided by 2) 
Algebra II
Multiple Choice (theta) means the symbol 0 with the dash in it. 1.)Which expression is equivalent to tan(theta)(sec(theta))/(sin(theta))? 
Precalculus
Find cot x if sin x cot x csc x = .square root 2 After reducing i got cot= square root of 2 Am i correct? 
Math Trig
1. Determine the exact value of cos^1 (pi/2). Give number and explanaton. 2. Determine the exact value of tan^1(sq. root 3). with explanation. 3. Determine exact value of cos(cos^1(19 pi)). with explanation. 4. Determine the exact … 
precalculus
find all solutions of each equations a) cos2x=square root of 3/2 b)cos 2theta/3 =1 c) cot 3 theta /2 = square root of 3 d) sin (2xpie/4) = square root of 2/2 
Math Answer Check
P is a point on the terminal side of θ in standard position. Find the exact value of the six trigonometric functions for θ. P(8, 8) Ans: cotangent: 1 secant: negative square root 2 cosecant: negative square root 2 sin: … 
calculus
Find the exact value of the given expression using a sum or difference formula. sin 345° Can you help with this?