If `sin theta=3/5`, then `cos theta`=?

If theta is in 1st quadrant, sin theta=3/5 , then cos theta =? .

If 180^(@) lt theta lt 270^(@) , sin theta =-3//5 , then cos theta //2=

I : If 180^(@) lt theta lt 270^@ , sin theta = -3//5 " then " cos theta //2 -=1//10 . II : If 630^(@) lt theta lt 720^(@) , |tan theta | =12//5 " then " tan theta//2= 2//3

If sin theta=(3)/(5), evaluate (cos theta-(1)/(tan theta))/(2cot theta)

If sin theta - cos theta = 3/5, sin theta cos theta = __________

Prove that : (sin 5theta - 2 sin 3theta + sin theta)/(cos 5theta -cos theta) = tan theta

If Sin theta = 4/5 and Cos theta=3/5 find the value of Sin^(2)theta+Cos^(2) theta

If sin theta - (4)/(5) and Cos theta = (3)/(5) find the value of Sin^(2) theta + cos^(2) theta

Prove that : (sin 5theta + sin 3theta)/(cos 5theta + cos 3theta) = tan 4theta

Prove that :(sin5 theta+sin3 theta)/(cos5 theta+cos3 theta)=tan4 theta