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There is not cos2 button on a TI-83 plus. You will need to enter the cosine function and then square it. (Press the x2 button to get the squared function.)

To type cos2(90) on a TI-83 plus, for example, type:

cos(90)2

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12y ago

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Related Questions

What is the solution to cos2 plus cos2tan2 equals 1?

cos2 + cos2tan2 = cos2 + cos2*sin2/cos2 = cos2 + sin2 which is identically equal to 1. So the solution is all angles.


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The TI-83 calculator uses 4 AAA batteries.


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You cannot. A calculator is programmed. It is made to calculate correctly.


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What does negative sine squared plus cosine squared equal?

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Some TI83's can be set up differently, so it is highly recommendable to read the user guide for the TI83 in question. The user would need to go into the VarStat option and enter all the appropriate fields to have the calculator bring in the appropriate variables and totals.


How does 1-sin squared x times 1 plus tan suared x equals 1?

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