07-09-2019
Mathematics

contestada

sin97cos43+cos97 sin43

Respuesta :

aamaruf aamaruf

07-09-2019

Answer:

sin 40

Step-by-step explanation:

We know,

sinA cosB + cosA sinB = sin(A+B) [Formula]

Here,

A=97 ; B= 43

Now,

sin97cos43+cos97 sin43

= sin (97+43)

=sin 140

=sin (180-40) [sin(180-A)=sinA ; here A = 40]

=sin 40

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