Evaluate the following: tan 12 ° cot 78 °

Evaluate the following: `(tan12°)/(cot78°)`

योग

`(tan12°)/(cot78°)`

= `(tan(90° - 78°))/(cot78°)`

= `(cot78°)/(cot78°)`
= 1.

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Trigonometric Equation Problem and Solution

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अध्याय 22: Trigonometrical Ratios of Standard Angles - Exercise 27.3

अध्याय 22 Trigonometrical Ratios of Standard Angles
Exercise 27.3 | Q 1.3

If sin 3A = 1 and 0 < A < 90^°, find sin A

From the given figure,
find:
(i) cos x°(ii) x°(iii) `(1)/(tan^2 xx°) – (1)/(sin^2xx°)`
(iv) Use tan x^o, to find the value of y.

State for any acute angle θ whether cos θ increases or decreases as θ increases.

Solve the following equation for A, if tan 3 A = 1

Solve for x : cos (2x - 30°) = 0

Find the value of 'A', if cot 3A = 1

Find the value of 'x' in each of the following:

In a trapezium ABCD, as shown, AB ‖ DC, AD = DC = BC = 24 cm and ∠A = 30°. Find: length of AB

Find x and y, in each of the following figure:

Evaluate the following: sin28° sec62° + tan49° tan41°