Q3 of 23 Page 1

Solve sub-questions:

Show that:

LHS =

⇒ LHS =


⇒ LHS = = (sin2A =1- cos2A)


⇒ LHS =


⇒ LHS = =


⇒ LHS = = RHS


Hence Proved


More from this chapter

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3

Solve sub-questions:

The length, breadth and height of a cuboid are in the ratio 5:4: 2. If the total surface area is 1216 cm2, find dimensions of the solid.

 3

Solve sub-questions:

Construct the incircle of Δ RST in which RS = 6cm, ST 7 cm, RT


= 6.5 cm.

 4

Solve sub-questions:

Prove that “the opposite angles of cyclic quadrilateral are supplementary”

 4

Solve sub-questions:

A person standing on the bank of a river observes that the angle of elevation of the top of a tree standing on the opposite bank is 60°. When he moves 40 m away from the bank, he finds the angle of elevation to be 30°. Find the height of the tree and width of the river.