Let's say that, that equals some angle θ
thus $\bf sec^{-1}(1)=\theta \iff sec(\theta)=1\\\\
-----------------------------\\\\
sec(\theta)=\cfrac{1}{cos(\theta)}\qquad thus\\\\
-----------------------------\\\\
\cfrac{1}{cos(\theta)}=1\implies \cfrac{1}{1}=cos(\theta)\implies 1=cos(\theta)
\\\\\\
\textit{now, taking }cos^{-1}\textit{ to both sides}
\\\\\\
cos^{-1}(1)=\theta$

so.. .check your Unit Circle, what is that angle anyway?

8 0

4 years ago

Solve the proportion 2/7=x/42

gladu [14]

Cross multiply. 2 times 42= 7x
84/7= 12
X= 12

Math will help you get a degree and you will raise a family with more money- afford a house— and pay your taxes.

5 0

3 years ago