Use tables to find cosine of9° 23’ + 15° 54’ - Vidyadip

Question

Use tables to find cosine of9° 23’ + 15° 54’

✓

Answer

cos (9° 23’ + 15° 54’) = cos 24° 77’ = cos 25° 17’ = cos (25° 12’ + 5’) = 0.9048 − 0.0006 = 0.9042

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[1 Mark Question Answer]" from Trigonometrical Identities→Trigonometrical Identities — all question types→Mathematics STD 10 question papers→ICSE Board STD 10 question papers→ICSE Board question paper generator→

Similar questions

If $A=\left[\begin{array}{cc}0 & 2 \\ 5 & -2\end{array}\right], B=\left[\begin{array}{cc}1 & -1 \\ 3 & 2\end{array}\right]$and $I$ is a unit matrix of order $2 \times 2$ findb $BA$

An unbiased dice is thrown. What is the probability of getting a number other than 4.

If $\sqrt{2}$ is a root of the equation $k x^2+\sqrt{2}-4=0$, find the value of $k$.

Solve : 2 (x – 2) < 3x – 2, x ∈ { – 3, – 2, – 1, 0, 1, 2, 3} .

Find the sub-duplicate ratio of $9x^2a^4: 25y^6b^2$

Find the sub$-$triplicate ratio of $27a^3 : 64b^3$

Which of the following lists of numbers form an A.P.? If they form an A.P., find the common difference d and write the next three terms : – 2, 2, – 2, 2,…..

Evaluate
cos40° cosec50° + sin50° sec40°

Find the discriminant of the following equations and hence find the nature of roots: $3x^2 + 2x - 1 = 0$

Draw a line of symmetry of semi-circle.