write down the value (corect to three decimal places of:-
a) sin64=
b) tan21=
c) cos67.4=
To find the values of trigonometric functions like sine, cosine, and tangent, you can use a scientific calculator. Here's how to find the values correctly rounded to three decimal places for each of the given trigonometric functions:
a) sin(64°):
1. Make sure your calculator is set to degree mode. This is usually indicated by "DEG" or "°" on the display.
2. Enter "64" on your calculator.
3. Press the "sin" button (sometimes labeled as "sinθ" or "sine").
4. The result will be displayed on the calculator. For sin(64°), the value is approximately 0.898.
b) tan(21°):
1. Again, ensure that your calculator is set to degree mode.
2. Enter "21" on your calculator.
3. Press the "tan" button (sometimes labeled as "tanθ" or "tangent").
4. The calculator will provide the result. For tan(21°), the value is around 0.384.
c) cos(67.4°):
1. Set your calculator to degree mode if it isn't already.
2. Enter "67.4" on your calculator.
3. Press the "cos" button (usually labeled as "cosθ" or "cosine").
4. The calculator will display the result. For cos(67.4°), the value is approximately 0.389.
Remember to round the answers to three decimal places as requested.
geee, anybody should be able to punch keys on a calculator.
you need to use a calculator for this..
but...
sin64=.920
tan21=-1.53
cos67.4=-.144