Q. 1 A4.4( 28 Votes )

# Evaluate the following.A. sin 45° + cos 45°

By trigonometric identities, we can say

sin 45° = 1/√2

and cos 45° = 1/√2

sin 45° + cos 45° = 1/√2 + 1/√2

sin 45° + cos 45° = 2/√2 = √2

Thus, sin 45° + cos 45° = √2.

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