Question

in a right angle triangle length of a base is 4cm and its perpendicular is 3cm .Find cos​

Answer 1

Answer:

Explanation:

In a Right angled Triangle ,

Hypotenuse = √(base)²+(perpendicular)²

= √(4)²+(3)² = √(16+9) = √25

Hypotenuse = 5 cm

Answer 2

Answer:

cos=4/5

Explanation:

Take a right triangle ABC, right angled at B in which base AB =4cm and perpendicular BC= 3cm. Then on applying Pythagorous theorem we canf easily find it's hypotenuse =5.

and finally we know cos = B/H.

B= 4 (given) and H= 5.