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Which of the following statements is tru...

Which of the following statements is true
I : If `(a+b+c)(a+b-c)=ab` then `angleC=60^(@)`
II If `sin^(2)A+sin^(2)B+sinC=2` in a `DeltaABC` then it is right angled

A

only I is true

B

only II is true

C

both I, II are true

D

neither I nor II is true

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Which of the following statements is true I : In a DeltaABC if a= R tan A then b^(2)+c^(2)=bc+a^(2) II. In a DeltaABC if a sin A= c cos B+ b cos C then the triangle is right angled

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    D
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    C
    both I and II
    D
    neither I nor II

  • If sin ^(2) A+ sin ^(2) B + sin ^(2) C then angle C =

    A
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    B
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    C
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    D
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