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Sin 10° cos 80° + cos 10° sin 80° solve it ...(without using table )​

User Empiric
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1 Answer

4 votes
You can solve the expression using trigonometric identities, specifically the sum of angles formula for sine.

sin(10°)cos(80°) + cos(10°)sin(80°)

= sin(10° + 80°) (Using the sum of angles formula for sine)

= sin(90°) (10° + 80° is equal to 90°)

= 1

So, sin(10°)cos(80°) + cos(10°)sin(80°) equals 1.
User Stuart Cusack
by
8.4k points
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