Question

sintheta+cos(90+theta)+sin(180-theta)+sin(180+theta)is​

Answer 1

sin∅ + cos(90°+∅) + (sin 180° -∅) +sin(180°+∅)=sin∅ - sin ∅ + sin∅ - sin∅=0

Note:At odd multiples of 90° the function changes

Sin and cosec functions are positive in 2nd quadrant

cos and secant functions are positive in 4th quadrant

tan and cot are positive in 3Rd quadrant

in 1St quadrant all positive