Find the value of:-Cos 105°

Exercise 6.3 2 A(-3)+(-6)________ (-3)-(-6)

In Question 10 of exercise 5.5,
There is x along with cos in the last answer of du/dx.

Please take a look into it.

Write five rational number in each of the following patterns

Abcd is a quadrilateral is ab

What is mean by vertically opposie angle 

If a and B are the zeros of the polynomial f(x)=x2+px+q

Find the least number must be added to each of the following numbers so as to get a perfect square . Also find the square root of the perfect square so obtained      
836
3013
475 
 1430

No image

why it came 180

If cos =2/3 then the value of

5x-2/1+2x+3x²dx

This photo is solution

An iron rod 5m long is placed against the wall in such a way that the foot of the rod is 3m away from the wall find how high the top of the iron rod is

Morning assembly is an integral part of the school’s schedule. Almost all the schools conduct morning assemblies which include prayers, information of latest happenings, inspiring thoughts, speech, national anthem, etc. A good school is always particular about their morning assembly schedule. Morning assembly is important for a child’s development. It is essential to understand that morning assembly is not just about standing in long queues and singing prayers or national anthem, but it’s something beyond just prayers. All the activities carried out in morning assembly by the school staff and students have a great influence in every point of life. The positive effects of attending school assemblies can be felt throughout life. Have you noticed that in school assembly you always stand in row and column and this make a coordinate system. Suppose a school have 100 students and they all assemble in prayer in 10 rows as given below. Here A B, ,C and D are four friend Amar, Bharat, Colin and Dravid

Sin (90-A) × sinA × cot A (-1) = ( -sin²A)

What is insulator 
What is conductor

Explain

What is I?