you answer 95% of the quedtions coretly on a 40-question test.How many questios do you answer incorrectly?

Mathematics

2 answers:

mr Goodwill [35]3 years ago

5 0

Answer:

Step-by-step explanation:

proportions

bogdanovich [222]3 years ago

4 0

38.

38/40=.95 so 2answers incorrect is the answer

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Cot^2x-csc^2x=-1 for all values of x true or falsse

Leno4ka [110]

Our basis for this equality is the pythagorean theorems of trigonometry. There are three equations for the pythagorean theorems. These are:

sin²x + cos²x =1
1 + tan²x = sec² x
1 + cot² x = csc² x

These are all derived from circle geometry on the cartesian plane. Now, the useful trigonometric property to be used is the third one. Rearranging this, we come up with

cot²x - csc²x = -1

This coincided with the given equation. Therefore, this is true. This is because it is already established from the pythagorean theorems.

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