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Question

In triangle ABC, right angled at B, if one angle is 45, find the value of sin A and cos C.


A

1, 1

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B

2, 2

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C

12, 12

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D

13, 13

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Solution

The correct option is C

12, 12


In right angle triangle ABC, B = 90.

Let A = 45.

Then C = 1809045 = 45 (using angle sum property)

So, sin A = sin 45 = 12

and cos C = cos 45 = 12


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