3 years ago

All birds can fly ? True and false

Mathematics

2 answers:

Oksanka [162]3 years ago

8 0

False because pinguins can't fly

zepelin [54]3 years ago

4 0

False. What about the penguins?

Although other birds can fly, only penguins can't. They are good at swimming and diving.

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Verify the identity. cot. (x - (pi/2)) = -tan x Please, help me!!!

Leya [2.2K]

Answer:

cot . (x- π/2)= - tanx

Step-by-step explanation:

cot . (x- π/2)= - tanx

cot .x - cot π/2= - tanx

cot π/2= 1/tanπ/2

But tan π/2= ∞

cot π/2 = 1/∞= 0

cotx - 0= - tanx

cot x = - tanx

cosx/sinx= - sinx/cosx Putting values of cot and tan

cosx/ sinx ( sinx/cos x) = -sinx/cos x (sinx/cos x )

Multiplying both sides with sinx/cos x

1= - sin²x/cos²x

cos²x= - sin²x as cosx = -sinx

5 0

3 years ago

Simplify 2/x+3 - 3/x-5

Arada [10]

First, you should equalize the denominator of first and second fraction. If the denominator multiplies by (x-5), so does the numerator. If the denominator multiplies by (x+3), so does the numerator.
(Look into my attachment at the second row)

Second, simplify the algebraic form for the numerator.
(Look into my attachment at the fourth row)

Third, simplify the denominator
(Look into my attachment at the last row)