Saturday

March 28, 2015

March 28, 2015

Posted by **Ntombie** on Monday, September 19, 2011 at 12:02pm.

- trig -
**Steve**, Wednesday, September 21, 2011 at 12:38pmThe graph of cos2x looks just like the graph of cos x, but oscillates twice as fast. So, since cos x crosses at -90 and 90, cos 2x crosses at -135, -45, 45, 135 deg.

The sin graph looks just like sin x, but is shifted to the left 30 deg. (That is, x+30 is zero when x=-30. In effect, just draw a new y-axis at x=-30 deg.)

**Answer this Question**

**Related Questions**

6th grade math - Which expression could you use to find the measure of an angle ...

Calculus - Find the exact values of the following. cos 270 degrees = 90 degrees...

trig - on the same set of axes sketch the graph of f(x)=sin2x and g(x)=2sin x ...

Math - The graph of the cosine function is the same as the graph of the sine ...

trig - on the same set of axes: (0 degrees is greater than or equal to x and x ...

Trig - Does this result in no triangle, 1 or 2 triangles? If so, then solve. B= ...

trig 30 - If cos^2 theta -6 sin 2 theta =0, one value of theta is a)0 degrees b...

Physics - Find the angle that the vector R = A + B makes with the positive x ...

Trig(continued) - 2)Find the solution of sin2 theta = cos theta if 0 -< theta...

trig - If cscx=2 and x greater 90 degrees and x less than 180 degrees, then sin ...