lim
cos^2(x+h)-cos^2x/h
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Answered by
1
Answer:
Hey there!
\bold{x^2+5=21}x
2
+5=21
Firstly, subtract by the number \bold{5}5 on each of your sides
\bold{x^2+5-5=21-5}x
2
+5−5=21−5
\bold{Cancel:5-5}Cancel:5−5 because it gives us the result of \bold{1}1
\bold{Keep:21-5}Keep:21−5 because it equals: \bold{16}16
\bold{x^2=16}x
2
=16
Nextly, we have to take our square root
\bold{x=}x= ±\bold{\sqrt{16}}
16
Solve the square root and you have found your answer
\boxed{\boxed{\bold{Answer:x=4[or]x=-4}}}
Answer:x=4[or]x=−4
\bold{\checkmark}✓
Good luck on your assignment and enjoy your day!
~\bold{LoveYourselfFirst:)}LoveYourselfFirst:)
Answered by
0
Answer:
Lim h→ 0 cos2x+h-cos2 x,h is equal to : a 2 sin x b sin x cos x c − sin 2x d cos2 x
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