Hi!
Can you solve it from here?
i've figured out part of the problem but i dont' understand what part of it means and i don't know how to do it without a calculator
3 sin^2 x=cos^2 x 0<or equal to x <2pi - what does this inequality mean?
i know that sin^2 x + cos^2 x = 1 so i did this
3 sin^2 x = 1 - sin^2 x
but i don't know what how to solve for x from here and i can't use a calc
thanks!
Here's a slightly different method.
Simply divide by on both sides and divide by 3 on both sides.
Domain:
Given:
Divide by on both sides:
Divide by 3 on both sides:
Remember that:
So let's replace now:
Take the square root:
To find the exact value without using a calculator, use the special 30-60-90 triangle. Check this out for more information:
Special right triangles - Wikipedia, the free encyclopedia