Friday

February 27, 2015

February 27, 2015

Posted by **Caitlin** on Monday, March 1, 2010 at 2:26pm.

4sin^2x = 3cos^2x

- Maths -
**Reiny**, Monday, March 1, 2010 at 5:26pm4sin^2x = 3(1-sin^2x)

4sin^2x = 3 - 3sin^2x

7sin^2x = 3

sin^2x = 3/7

sinx = ±√(3/7), so x is in any of the 4 quadrants

In first quadrant I get x = 40.9 degrees

in II, x = 180 - 40.9

in III, x = 180+40.9

in IV, x = 360-40.9

**Answer this Question**

**Related Questions**

Algebra help - f(x)=x^3-4x^2-x+4 How do I find the x-intercept for this? This is...

Math - ((4sin(atan(4/3))-4sin(0)))-(-3cos(atan(4/3))-(-3cos(0)))+((-3cos(pi/2...

pre algebra - solve the equation step by step.list each step along with the ...

Algebra 1--Step-by-Step - Can someone show me how to solve these step-by-step? ...

algerbra - solve the equation step by step list each step along with the ...

ALGEBRA HELP - When solving the equation, what property was used to go from step...

Maths - solve |x^2-5|=5x+9 please explain step by step how to get to the answer

Maths - Differentiate y=(5x-2)^3(3-x)^6 using the product rule. i don't get the ...

maths - Solve k^2 + km = 8 m = k- 6 Can you show me step-by step please?

Maths - Solve k^2 + km = 8 m = k- 6 Can you show me step-by step please?