Tuesday

September 2, 2014

September 2, 2014

Posted by **Bailey** on Sunday, May 12, 2013 at 8:07pm.

- Math -
**Reiny**, Sunday, May 12, 2013 at 10:43pmcosx = √3/2

and we know that the cosine is positive in quadrants I and IV

I also know that cos 30° or cos π/6 = √3/2

so x = 30° or 330° OR π/6 , 11π/6 in radians

then sinx = 1/2

or

sinx = -1/2 (because the sine is negative in IV)

**Answer this Question**

**Related Questions**

Trig........ - I need to prove that the following is true. Thanks (cosx / 1-sinx...

Math - Verify the identity . (cscX-cotX)^2=1-cosX/1+cosX _______ sorry i cant ...

Math - 1) evaluate without a calculator: a)sin(3.14/4) b) cos(-3(3.14)/4) c) ...

Pre-Calc - Trigonometric Identities Prove: (tanx + secx -1)/(tanx - secx + 1)= ...

Trigonometry Check - Simplify #3: [cosx-sin(90-x)sinx]/[cosx-cos(180-x)tanx] = [...

Trigonometry. - ( tanx/1-cotx )+ (cotx/1-tanx)= (1+secxcscx) Good one! ...

trig - sinx=square root of 3 over 2, cosx=1 over 2 i want to find all six ...

Math - Pre- Clac - Prove that each of these equations is an identity. A) (1 + ...

Calculus - Find the dervatives: 1. f(x)=(3x+1)e^x^2 2. y = e^(sin x) ln(x) 3. f(...

trigonometry - can i use factoring to simplify this trig identity? the problem ...