Question
Evaluate the following:
$\frac{\sin19^\circ}{\cos71^\circ}$
$\frac{\sin19^\circ}{\cos71^\circ}$
✓
Answer
$\Rightarrow\frac{\sin(90^\circ-71^\circ)}{\cos71^\circ}=\frac{\cos71^\circ}{\cos71^\circ}$
$=1$
$=1$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Find $a_{30} - a_{20}$_ for the A.P.
$a, a + d, a + 2d, a + 3d$, .....
→$a, a + d, a + 2d, a + 3d$, .....
Apply division algorithm to find the quotient $q(x)$ and remainder $r(x)$ in dividing $f(x)$ by $g(x)$ in the following:
$f(x) = x^3 - 6x^2 + 11x - 6, g(x) = x^2 + x + 1$
→$f(x) = x^3 - 6x^2 + 11x - 6, g(x) = x^2 + x + 1$
Which of the following sequences are arithmetic progressions. For those which are arithmetic progressions,
find out the common difference.
$0, -4, -8, -12$, .....
→find out the common difference.
$0, -4, -8, -12$, .....
Show that the point $(11, – 2)$ is equidistant from $(4, – 3)$ and $(6, 3)$
→In Δ MNP, NQ is a bisector of ∠N. If MN = 5, PN = 7 MQ = 2.5 then find QP.
In the figure, BOA is a diameter of a circle and the tangent at a point P meets BA produced at T. If $\angle\text{PBO}=30^{\circ}$ then find $\angle\text{PTA}.$
→What can you say about the prime factorisations of the 43 of the following rationals:
0.120120012000120000...
0.120120012000120000...
In ΔPQR, point S is the midpoint of side QR. If PQ = 11,PR = 17, PS = 13,find QR.
What is the perimeter of a square which circumscribes a circle of radius a cm?
Write the value of $\tan10^\circ\tan15^\circ\tan75^\circ\tan80^\circ?$
→