Hey, can someone please explain how to do this

Find the Sin, Cos, and Tan of the following angle:
-45 degrees

(i need an explanation not just an answer because i have a test tomorrow)

i am learning this right now and i think that all you would have to do is the number into the "equation" with the negative sin, cos, tan, close the parenthesis then press enter or =

Step-by-step explanation:

Sin^-1(-45)=

cos^-1(-45)=

tan^-1(-45)=

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.

no not all of them.

step-by-step explanation:

some of them have a square base.