jesusjesus1122222 jesusjesus1122222
  • 23-07-2020
  • Mathematics
contestada

Which is the correct identity for (pi/2-0) ?

Respuesta :

kittika27
kittika27 kittika27
  • 23-07-2020

Answer:

sin

θ

Step-by-step explanation:

∣

∣

∣

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

a

a

cos

(

A

±

B

)

=

cos

A

cos

B

∓

sin

A

sin

B

a

a

∣

∣

−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−

⇒

cos

(

π

2

−

θ

)

=

cos

(

π

2

)

cos

θ

+

sin

(

π

2

)

sin

θ

now

cos

(

π

2

)

=

0

and

sin

(

π

2

)

=

1

⇒

cos

(

π

2

−

θ

)

=

0

×

cos

θ

+

1

×

sin

θ

=

sin

θ

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