Math, asked by dona1919, 7 months ago

The expression sin(18+theta)cos(72-theta)+cos(18+theta)sin(72-theta) equals​

Answers

Answered by raviparmar2002
0

Step-by-step explanation:

we know that sinacosb + cosasinb = sin(a+b)

so by taking a = 18 + theta

and b = 72 - theta

answer is sin(a+b)

putting a and b

sin (18 + theta + 72 - theta)

= sin 90

= 1

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