Ex(1)quad " If "sin theta=(20)/(29)" then find "cos theta

If sin theta = (20)/(29) , then find the value of cos theta .

If sin theta = (20)/(29) , then find the value of cos theta .

If 90^(@) < theta < 180^(@) and sin theta = 20/29 , then cos theta = ?

Find "sin" 2theta when "sin" theta+cos theta=1 .

If sin^(4) theta+cos^(4)theta=(1)/(2) , then find sin theta cos theta .

If A=6 sin20^(@) - 8 sin^(3) 20^@ , B= 8 cos^(3) 20^(@)-6 cos 20^(@) and C= ( sin 3 theta )/( sin theta ) - ( cos 3 theta )/( cos theta ) then

If (cos theta)/(1- sin theta) + (cos theta)/(1 + sin theta) =4 , then find the value of cos theta . Find theta if 0^(@) lt theta lt 90^(@)

Find sin 2 theta when sin theta + cos theta= 1 .

If sin theta_(1)+sin theta_(2)+sin theta_(3), then find the value of cos theta_(1)+cos theta_(2)+cos theta_(3)