Evaluate
sin? 63+ sin 27
Cos? 17+ Cos? 73
Answers
Answered by
3
Step-by-step explanation:
Answer
Given,
cos
2
17+cos
2
73
sin
2
63+sin
2
27
=
cos
2
(17)+(cos(90−17))
2
sin
2
63+(sin(90−63))
2
As we know
90−63=27
90−17=73
from (sin(90−63)=cos63, cos(90−17)=sin17,
Now,
cos
2
17+cos
2
73
sin
2
63+sin
2
27
=
cos
2
(17)+(cos(90−17))
2
sin
2
63+(sin(90−63))
2
=
cos
2
17+sin
2
17
sin
2
63+cos
2
63
=
1
1
=1 ∵sin
2
A+cos
2
A=1
Answered by
1
Answer:
sin63+sin(90-63)
=sin63+cos63
=sin+cos=1
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