Anyone know the answer to these questions ?

see explanation

Step-by-step explanation:

Using the tangent ratio in the right triangle and tan45° = 1

tan45° = = = 1 ( multiply both sides by 7 )

x = 7

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(8)

Using the cosine ratio and cos45° =

cos45° = = = ( cross- multiply )

y = 7

  the correct choice is marked

step-by-step explanation:

the first two graphs show multiple turning points. the last graphs matches the description in every detail.