If cos A + cos B = m and sin A + sin B = n , when m,n not equal to 0, then what is cos (A+B) equal to? Class 11 Trigonometry

 

1-2x-x^2 = tan^2(x+y) + cot^2(x+y) find x and y Class 11 | Trigonometry Function | IITJEE

 

Prove that 1 + cosA/1- cosA = tan^2A/SecA-1 Class 10 | trigonometry

 

Prove that cos theta . cot theta/1+sin theta = cosec theta -1 | Class 10 Trigonometry | ICSE

 

asin(theta) + bcos(theta) =c then find acos(theta) - bsin(theta)

tan x= 5/12 and tan y= 3/4, AB = 48 m find CD | Class 9 | Trigonometry

 

Answer: CD = 45 m

If 7 cosec(theta) - 3cot(theta)=7 Find 7cot(theta)-3cosec(theta) Class 10 Trigonometry

In the given figure angle C = 90° and D is the mid point of AC

Sin⁴theta/x + sin⁴theta/y=1/x+y then prove that sin¹²theta/xⁿ+cos¹²theta/yⁿ=1/(x+y)ⁿ

 

Class 10 Math CBSE Trigonometry, Triangle, Coordinate, Circle Test FM-20

 

Class 10 | Math Trigo, Quadratic, Shares and Dividend, Ratio and Remainder FM 25

 

Class 9 Trigonometry FM 30

 

Class 10 | Trigonometry | Proof that cosA/1+SinA + 1+sinA/cosA = 2 secA

 

Class 9 Trigonometry Test FM 35

 

Class 10 Math Trigonometry and Height and Distance Written Test FM 30

 

Class 10 Trigonometry and Height and Distance Written Test FM 30

 

ANSWER 

2.
Class 10 | Height and Distance | The angles of elevation of the top of a tower from two points at distances ‘a’ and ‘b’ metre from the base and in the same straight line with it, are complementary. The height of the tower is:

3. Prove that :  (sinA-cosA+1/SinA+cosA-1) = cosA/1-sinA

4.
Class 10 Math ICSE SELINA EX 21A Question 42

5.
If sin theta + cos theta = sqrt3 then find, tan theta + cot theta

7.
tan theta = cot 3theta then find the value of sin 2theta

11.
From a point, 36 m above the surface of a lake, the angle of elevation of a bird is observed to be 30o and the angle of depression of its image in the water of the lake is observed to be 60 degree . Find the actual height of the bird above the surface of the lake.

In the given figure, triangle ABC is right angled at B. D is the foot of the perpendicular from B to AC. given that BC=3 cm and AB= 4 cm Find tanDBC and SinDBA

 

Class 10 Math Selina ex 21A question 38 | ( 1 + cotA -cosecA)(1+tanA+secA) = 2 prove

 

Class 10 Trigonometry | sec theta= x+1/4x find sec theta + tan theta

ANS: 2x or 1/2x

 

Class 10 Trigonometry | (Costheta-Sintheta) / (costheta+sintheta) = (1-root3/1+root3) find theta