Question

Evaluate
sin? 63+ sin 27
Cos? 17+ Cos? 73​

Answer 1

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

Answer 2

Answer:

sin63+sin(90-63)

=sin63+cos63

=sin+cos=1

solve part to as similar

Mark me as a brianliant

follow also