Coordinate points of P are opposite points (b,0)
(-b , 0) is opposite of (b,0)
Answer is the second option (-b,0)
Answer:
(1-cos2A) /(1+cos2A) =tan²A
Proof:
We know that,
cos(A+B) =cosA.cosB-sinA.sinB
=>cos2A=cos(A+A)
=>cos2A=cosA.cosA - sinA.sinA
=>cos2A=cos²A-sin²A
=>cos2A=(cos²A-sin²A)/(cos²A+sin²A
Since {cos²A+sin²A=1}
Divide the numerator & the denominator by (cos²A) to get,
cos2A = {(cos²A-sin²A) ÷cos²A} / {(cos²A+sin²A) ÷cos²A}
cos2A ={(1-tan²A)/(1+tan²A)}
Then,
1-cos2A = 1-[{(1–tan²A)/(1+tan²A)}]
1-cos2A =(1+tan²A-1+tan²A)/(1+tan²A)
1-cos2A=(2tan²A)/(1+tan²A)
And now.......
1+cos2A=1+[{(1-tan²A)/(1+tan²A)}]
1+cos2A={1+tan²A+1-tan²A}/{1+tan²A}
1+cos2A=2/(1+tan²A)
So now,
(1-cos2A)/(1+cos2A)= {2tan²A/(1+tan²A)}÷{2/(1+tan²A)}
={(2tan²A)(1+tan²A)}÷{2(1+tan²A)}
=tan²A
Step-by-step explanation:
make me as brain liest
Answer:
4f
Step-by-step explanation: multiply the outside number (1) by the number inside the parenthesis (4) and then add the letter.
<em>Answer:</em>
<em>4 + √15 > 3 + √6</em>
<em>Step-by-step explanation:</em>
<em>Hi there !</em>
<em>√15 ≈ 3.87</em>
<em>4 + 3.87 = 7.87</em>
<em>√6 ≈ 2.44</em>
<em>3 + 2.44 = 5.44</em>
<em>7.87 > 5.44</em>
<em>4 + √15 > 3 + √6</em>
<em>Good luck !</em>
Answer:
Step-by-step explanation:
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