Question:
In each of the following cases find the least positive value of $\displaystyle \alpha$ for which:
$\displaystyle \cos ( \alpha-\theta )^o = \sin \theta^o $
Attempt:
Don't know how to get the value of $\displaystyle \alpha$
Question:
In each of the following cases find the least positive value of $\displaystyle \alpha$ for which:
$\displaystyle \cos ( \alpha-\theta )^o = \sin \theta^o $
Attempt:
Don't know how to get the value of $\displaystyle \alpha$
Hello,
Once again use the formula :
cos(a-b)=cos(a)cos(b)+sin(a)sin(b)
So you will have to find $\displaystyle \alpha$ such as $\displaystyle \cos(\alpha)=0$ and $\displaystyle \sin(\alpha)=1$ as this relation has to be true for any $\displaystyle \theta$