3 years ago

Help help help help help help

Mathematics

2 answers:

Alexandra [31]3 years ago

8 0

Answer:

its E

Step-by-step explanation:

Shalnov [3]3 years ago

5 0

Have fun but I think it is b and e

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HELP!! I'm not sure what goes in the blank.

natta225 [31]

Answer:

10 $sin^{2} ($ β $)$

Step-by-step explanation:

We can find this two ways, first by seeing in the step after it, cosines are canceled out. Since you already have 10 $sin^{2} ($ β $)$ on the next step, you can assume that (since only the cosines changed and the cosine next ot the blank was removed), the value is 10 $sin^{2} ($ β $)$ .

You can also use double angle formulas from the previous step:

(sin(2β) = 2 sin(β) cos(β))and find that:

5 sin (2β) sin(β) = 5 * (2 sin(β) cos(β)) sin(β)) = (10 sin(β) sin(β)) cos(β) =

10 $sin^{2} ($ β $)$ cos(β)

But since cos(β) is already present, we can see that the answer is 10 $sin^{2} ($ β $)$

4 0

2 years ago

Which of the students found the correct value of their expression? Select all that are true. None of the students Student 2 Stud

Mariulka [41]

Answer:

Step-by-step explanation:

Student 2 and student 1