2 years ago

Ismail tried to prove that sin(θ) = cos(90°− θ) using the following diagram. His proof is not correct.

Mathematics

1 answer:

Anton [14]2 years ago

5 0

Answer:

C. Ismail used the wrong sides in his ratio for cos (90 - θ)

Step-by-step explanation:

All steps correct apart from:

cos (90° - θ) = AC/BC

It should be

cos (90° - θ) = AB/BC

Correct choice is C

You might be interested in

The maximum number of marks attainable at a mathematics competition is 60. Kate obtains 40 marks, Priya obtains 46 marks, and No

Anna71 [15]

Answer: See explanation

Step-by-step explanation:

Total marks = 60

Kate = 40 marks = 40/60 × 100 = 66.7%

Kate gets a bronze medal.

Priya = 46 marks = 46/60 × 100 = 76.7%

Priya gets a silver medal

Nora = 49 marks = 49/60 × 100 = 81.7%

Nora gets a good medal.

4 0

2 years ago

Hannah does push-ups in sets of 3.She did 10 sets pushups today.Then her coach asked her to do 15 more push-ups.How many push-up

Lana71 [14]

10x3= 30
30+15=45
Hannah did 45 push ups

7 0

3 years ago

Read 2 more answers

What can you simplify 90/120 to and how?

Leni [432]

Answer:

The answer is 3/4

Step-by-step explanation:

Reduce the expression, if possible, by cancelling the common factors.

~Hoped this helped~

~Brainiliest, please?~

3 0

2 years ago

Read 2 more answers

Which point is the vertex? C B A None of the above

Karo-lina-s [1.5K]

Answer:

Step-by-step explanation:

Hope this helps you out! :)

3 0

2 years ago

What is 72 x 1/4? I have no clue!

Dovator [93]

Answer:

Step-by-step explanation:

Honestly you can just use a calculator for this.

But if you want to know how to actually do it, multiplying something by a fraction is just dividing it by its reciprocal (just flipping the numerator and the denominator).

Therefore...

72/4 is 18, 72 x 1/4 = 18

6 0

2 years ago

Read 2 more answers