Math, asked by chanikyachowdary1, 10 months ago

I need answer quick

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Answered by ranjana83

1

Answer:

1

Step-by-step explanation:

f(2)=asin2 + 2bcos2 + 8 =15

aaina + 2bcos2 = 7...........(I)

now, f(-2)= asin(-2) -2bcos(-2) + 8

= -asin2 - 2bcos2 +8

=-(asin2 + 2bcos2) +8. (from eq 1)

= -7 +8 = 1

NOTE

cos(-x) = cos x

sin(-x) = -sinx

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