Value of cos 450 + sin 450
is equal to
(a) 1 (b) 1/ 2√2 (c) √2 (d) (√2+1) / 2
Answers
Answered by
1
Answer:
................................
Answered by
2
Step-by-step explanation:
cos(45
0
−A)=sin[90
0
−(45
0
−A)]
∵cosθ=sin(90
0
−θ)
=sin[45
0
+A]
∴
sin(45
0
+A)
cos(45
0
−A)
=
sin(45
0
+A)
sin(45
0
+A)
=1
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