Respuesta :

Luv2Teach
On your calculator, make sure you're in radian mode, not degree mode, that you are in a trig coordinate plane (do this by hitting "zoom" and choosing ZTrig), and when you enter the function into the "y =", you have to enter it in like this:  7cos(2x)-3.  Hit "graph" and you'll see that the wave goes through the x-axis in 4 places within your specified interval.  Hit 2nd and "trace" and then "zero".  Move your cursor so it's just above the x-axis where the curve goes through and hit enter, then move it so it's just below the x-axis where the curve goes through and hit enter again.  Hit enter a 3rd time, and you SHOULD see that your x has a value while y = 0.  Do that for all of the places where the curve goes through the x-axis. That's how you find the zeros of a trig curve (or any curve, for that matter) on a calculator.  The zeros are the solutions. If this was solvable like a regular equation, using trig identities and right triangles, you wouldn't have to use your calculator.  But just like when you go to factor a second degree polynomial and you're having trouble with it you can use the quadratic formula and it's never-fail, neither is your calculator.  

If the expression is 7 cos 2t = 3. Then the value of t will be 0.56 radian.

What is trigonometry?

The connection between the lengths and angles of a triangular shape is the subject of trigonometry.

The trigonometric expression is given below.

7 cos 2t = 3

Then the expression can be written as

cos 2t = 3/7

      2t = cos ⁻¹(3/7)

      2t = 64.62°

        t = 32.31°

Then the value of t will be 32.31 degrees.

Then the value of t will be 0.56 radian.

More about the trigonometry link is given below.

https://brainly.com/question/22698523

#SPJ5

Ver imagen jainveenamrata

Otras preguntas