Question

In the figure angle b=90, angle a=angle c and BC= 10 cm, then ring the value of tan 45​

Answer 1

are you a class 10 th student!

Answer 2

Given :-

• ∠B = 90° .
• ∠A = ∠C .
• BC = 10 cm.

To Find :-

• tan 45° = ?

Solution :-

we know that,

• Angle opposite to equal sides are equal .

so,

→ ∠A = ∠C (given)

then,

→ AB = BC

therefore,

→ AB = 10 cm .

so,

→ ∠A + ∠B + ∠C = 180°

→ 2•∠A + 90° = 180°

→ 2•∠A = 180° - 90°

→ 2•∠A = 90°

→ ∠A = 45°

hence,

→ tan 45° = AB / BC

→ tan 45° = 1 / 1

→ tan 45° = 1 (Ans.)

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