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2 years ago

1/3 + 3/8 =?? wich method can sole the number sentence

Mathematics

1 answer:

valentinak56 [21]2 years ago

6 0

Answer: 17/24
Eplination: you need a common demonator

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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 ,

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

$\sf\longrightarrow cos\theta =\dfrac{b}{h}$

And by Pythagoras theorem ,

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

Where the symbols have their usual meaning.

Now , taking LHS ,

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

Substituting the respective values,

$\sf\longrightarrow \bigg(\dfrac{p}{h}\bigg)^2+\bigg(\dfrac{b}{h}\bigg)^2\\$

$\sf\longrightarrow \dfrac{p^2}{h^2}+\dfrac{b^2}{h^2}\\$

$\sf\longrightarrow \dfrac{p^2+b^2}{h^2}$

From equation (i) ,

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

$\sf\longrightarrow \bf 1 = RHS$

Since LHS = RHS ,

Hence Proved !

I hope this helps.

5 0

1 year ago

I need the percentage of the shaded area.

arsen [322]

Answer:

1.22

Step-by-step explanation:

Since there is one whole shaded. And 2 tens, and 2 ones. Its 1.22.

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3 years ago

There's are 8 students who have 3/4 of a cake they want to share. How much of the cake will each student get if they spilt it ev

dmitriy555 [2]

Since there are 8 students, each student gets 1/8 of the available cake. Since there is 3/4 of a cake available, they will get 1/8 of 3/4.

Source: https://www.wyzant.com/resources/answers/142015/there_are_8_students_in_a_group_and_3_4_cake_how_much_cake_will_each_student_get_if_divided_evenly

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3 years ago

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—2+7+(-4). Evaluate

MakcuM [25]

Answer:

Step-by-step explanation:

-2 + (-4) = -6 + 7 = 1

evaluate = solve

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2 years ago

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hello! i struggle with math A LOT so if u guys can help me with these questions with the work i would appreciate a lot

elena-s [515]

Pretty sure 1 is 6/8

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3 years ago

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1/3 + 3/8 =?? wich method can sole the number sentence​

1/3 + 3/8 =?? wich method can sole the number sentence