Find the value of x if sin80 = Cos (90-x)

Question

Mathematics

Payten Stanton

17 September, 06:36

Find the value of x if sin80 = Cos (90-x)

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Answers (2)

Know the Answer?

Mohamed · Answer 1

Answer: 80

Step-by-step explanation:

Sin x = cos (90-x)

Like sin 30 = cos (90-30) = cos 60

So

90-x=90-80

Then

X=80

Verify your solution by finding the sum of the angles of sin and cos, it will be 90

Demetrius Church · Answer 2

Step-by-step explanation:

Sin Ф = Cos (90 - Ф)

Comparing with this

Sin 80 = Cos (90 - 80) = Cos 10

So, x = 80