ans for Q.19 14.
15.
16.
18.
If sinx Sin y + sin z sin w = - 4, then the value of + sinJOOy sin200z is
sin200z + sin100w
stn x. siny. Sin z. sin w
4
If sin x + sin2x + sinJx 1, then the value of cosox—4 cos •x + 8 cos2 x equals
A right triangle has perimeter of length 7 and hypotenuse of length 3. If is the largest non
right angle in the triangle, then the value of cos 0 equals
4-v'i
9 S rc and 81sin2e
+ 81cos20 = 30, then 0 is
300
b) 600
c)
1200
d)
1500
cot 6 + tan = x and sec O - cos 0 = y, then
x sin G.cosO I
(X2y)1/3 + (xy2)1/3
sin20 = y cos
(x2y)2/3 — (xy2)2/3
19. If x = sec Ø — tan and y = cosec + cotø, then
-1
y+l
If O < x < — and cos x + sin x = -, then the value of 16(cos x — sin x)2 is
