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1 year ago

Select all the equations that are true, and you can only pick 3...

Mathematics

1 answer:

lesya [120]1 year ago

5 0

Answer:

I only see one true equation. Please check the statements.

Step-by-step explanation:

О 0+451=0← for A FALSE

О 130+210=210+130← for B FALSE

О (123+57)+180=180+(87+180)←for C FALSE

√ for= 497+0=497←for D TRUE

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2 years ago

A sequence is defined by the formula f(n + 1) = f(n) – 3. If f(4) = 22, what is f(1)?

julsineya [31]

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2 years ago

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3 years ago

Prove : sin²θ + cos²θ = 1 thankyou ~

Gnom [1K]

Answer:

See below

Step-by-step explanation:

Here we need to prove that ,

$\sf\longrightarrow sin^2\theta + cos^2\theta = 1$

Imagine a right angled triangle with one of its acute angle as $\theta$ .

The side opposite to this angle will be perpendicular .
Also we know that ,

$\sf\longrightarrow sin\theta =\dfrac{p}{h} \\$

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And by Pythagoras theorem ,

$\sf\longrightarrow h^2 = p^2+b^2 \dots (i)$

Where the symbols have their usual meaning.

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From equation (i) ,

$\sf\longrightarrow\cancel{ \dfrac{h^2}{h^2}}\\$

$\sf\longrightarrow \bf 1 = RHS$

Since LHS = RHS ,

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1 year ago

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so....

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2 years ago

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