Question

(i) sin 25° cos 65° + cos 25° sin 65°​

Answer 1

$\huge\mathbf\red{Answer}$

Sin 25° cos 65° + cos25° sin 65°

Let 25° = A

65° = B

The given sum is the form

Sin A cosB + Cos A sin B

= Sin (A+B)

= Sin(25°+65°)

= Sin 90°

= 1

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Answer 2

Answer:

Sin 25° cos 65° + cos25° sin 65°

Let 25°. = A

65° = B

It is in the form Sin A cos B + cos A sin B

= Sin(A+B)

= Sin(25°+65°)

= Sin 90°

= 1

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