First question:
By definition of sine and cosine, we have
Second question:
By definition of tangent, we have
Then by Pythagoras' theorem,
Can someone help me with this math homework please!
1 answer:
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We want to get rid of the square root sign somehow, so let's isolate that term.
Now, in order to 'undo' a root sign, we need to do the opposite to it, by squaring the term, but in order for it to remain the same, we need to square 4 as well.
Now, we can isolate the variable:
, and since we can't simplify this further, our final answer becomes:
or 
Now, in order to 'undo' a root sign, we need to do the opposite to it, by squaring the term, but in order for it to remain the same, we need to square 4 as well.
Now, we can isolate the variable: