Question

Ssir (180-x) = ?
a) sin x (b) - sin x (C) cos x
(D) -cos x​

Answer 1

Answer:

sin x

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Answer 2

Step-by-step explanation:

there are four quardrants

1st quardant :(90-x),(360-x)

sine,cosine,tangent,cotangent,secant,cosecant. all are positive.

2nd quardant :(90+x),(180-x)

only sine and cosecant are positive.

tangent,cotangent,cosine,secant are negative.

3rd quardant :(180+x),(270-x)

only tangent and cotangent are positive.

sine,cosine,secant,cosecant are negative.

4th quardant : (270+x),(360-x)

only cosine and secant are positive.

sine,tangent,cotangent,cosecant are negative.

so sin(180-x) = +sinx