Question

Which expression is equivalent to sin(20°)cos(80°) – cos(20°)sin(80°)?

sin(–60°)
cos(–60°)
cos(60°)
sin(60°)

Answer 1

Answer:

A. sin(-60°)

Step-by-step explanation:

test on edge

Answer 2

Answer of given expression is sin(-60°)

What is Trigonometric functions?

Trigonometric functions defined as the functions which show the relationship between angle and sides of a right-angled triangle.

Given expression,

sin(20°)cos(80°) – cos(20°)sin(80°)

∵ sin(A-B) = sinA.cosB – cosA.sinB

∴ sin(20°-80°)

So, sin(-60°)

Learn more about Trigonometric functions

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