20 POINTS! PLZ ANSWER ASAP!
2 answers:
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Answer:
Ф =
Step-by-step explanation:
It is a bit difficult to input the work here, so I uploaded an image
- First we can use the trig identities to change sec²(Ф) to tan²(Ф) + 1
- Then we can combine like terms
- Then we can factor this as a polynomial function
- Then we can set each term equal to zero and solve for Ф
- The first term tan(Ф) - 2 = 0 has no solution because tan(Ф) ≠ -2 anywhere
- The second term tan(Ф) - 1 = 0 has two solutions of
and
so these are the solutions to the problem
Answer:
Step-by-step explanation:
The standard form of a quadratic is:
To complete the square, the a (leading coefficient) must be 1 and there can only be terms with variables on one side.
The expression given:
follows these rules. Next, we divide the b (linear coefficient) by 2, then square it. Basically:
The b in the expression is -18.
This is the number that is added.