Question

why
sin(180-theta)= sin(theta)
but
cos(180-theta)= -cos(theta)
??????
why sin is positive and cos would be negative??
plz explain correctly i'll mark Brainliest and follow u....!!!!!
plz answer fast!!!!​

Answer 1

Answer:

hiiii

sin(180-theta) = sintheta and cos (180-theta) = - costheta

because 180-theta is second quadrant and in second quadrant sin is positive and cos is negative

i think it's helps u thanks ❤️

Answer 2

180-theta lies in 2nd quadrant

In this perpendicular(y axis) remains positive but base (x axis ) becomes negative…

Sin theta = P/H (+ve) because P is +ve
Cos theta = B/H (-ve) because base is -ve