Question

sina(cosa)+(-cosa)(sina)​

Answer 1

SinA(cosA) + (-cosA)(sinA)

= SinAcosA - sinAcosA

= 0

Answer 2

Answer:

0

Step-by-step explanation:

(sin a)(cos a)+(-cos a)(sin a)

= sin a cos a - cos a sin a

= sin a cos a - sin a cos a

= 0

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