Question

Simplify. cosQsin(90°-Q)+ sinQcos(90-Q)
Q is theta

Answer 1

Answer:

1 us answer

Step-by-step explanation:

=)cosQ×cosQ +sinQ×sinQ

(sin (90 -Q)=cosQ and cos(90-Q)=sinQ)

=) cosQ^2 + sinQ^2 = 1

(cosQ^2 + sinQ^2 =1 is identity)

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