2 answers:
Answer:
Option d- 2 sin2x - 2 sin x cos x - 1
Step-by-step explanation:
the trigonometry identities are useful in this case.
Let the identity be:
Sin 2x = 2 sinx cosx
Cos 2x = 2cos²x - 1
Substituting gives:
2 sinx cosx - (2cos²x - 1)
cosx (2sin x - cosx) + 1
solving gives:
2 sin2x - 2 sin x cos x - 1
it is d hopefully this is helpful
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Answer: 64
Step-by-step explanation:
the Kids that answered correct in any of questions 1 and 2 got at least one right so subtract the highest number which is 81 students by all the general amount of them, 145 that’s 64.
answer: Subtract sixteen from both sides of the equation
2 +16 -16=22x -16
x = 4/5
Answer:
15
Step-by-step explanation:
half of 30 is 15
he used all the numbers upto 30 once
all the numbers in between arent integers but decimals
20% of 1000 = 200
40% of 200 = 80
Therefore there are 80 red sneakers
Hope this helps :)
